The point is, if my son comes home and says "I've got homework." I don't start with the, what is it, when is it due, sit down now, I'm going to sit next to you when you do it" way.
And nobody is expecting you to start interrogating him the second he mentions the word homework ... but what is wrong with your response being "Oh, what is it?" and letting the conversation flow from there, instead of immediately dismissing the homework as worthless rubbish? Perhaps he is telling you about his homework because he wants you to have input and show some interest?
You've gone straight for the extreme over-reaction of assuming that taking an interest = being overbearing. When I came home from school my parents would show interest in my day, and as part of that ask if I had homework, that wasn't them trying to be pushy, but them trying to show interest in my life. They knew everything I did out of school time, especially at primary school, since they made the schedule and decided what social activities we did etc - so school was the one thing they had no active part of. They dropped me at the school gates at 8:30 and collected me at 3:30 and those seven intervening hours' activities were a total mystery, unless they asked me to share it with them. So when they asked me "Get any homework today?" it was their way of asking what I had been doing at school and also helped them plan our evening, whether they had to allow time for homework or whether we could do a few non-essential household errands on the way home. It also meant they could keep an eye on my interests and what I was struggling with,since I would bounce out of school with the news of an English or History project but would be slow to reveal that I had Music or French homework because I struggled and I had no real interest in either subject. That meant my parents could be more supportive of my homework on Music or French days but leave me to it on English or History unless I asked for help.
All that I meant by this thread is that I think it's possible to actually cause problems for children at university or in the adult world by being the one driving them: ergo when you are no longer there, they can't motivate themselves. This was largely what happened to me and being totally honest I do struggle to do basic things at times.
And you cause just as much problems by being totally indifferent and not driving them at all. Children don't just start motivating themselves, it's part of growing up and is something they learn how to do as a process with both positive and negative consequences.
My parents were the one who intitally motivated me in life as well as school, and then scaled their involvement back as I got older and developed my own driving force as part of the wider process. I didn't just start motivating myself to learn, my parents fostered a positive attitude to learning and education, encouraged the things I was interested in and supported the things I struggled with so I could feel an even bigger sense of achievement when I did complete them. Through that support and guidance, I learned to see the bigger picture that I couldn't improve if I gave up the second things became difficult or because I had no initial interest. I learned to motivate myself to do things because they needed to be completed and not just because I liked it.
They also gave me consequences - if I finished my homework early then I got do another activity (eg baking cakes or ride my bike in the street with my friends) , but if I had rushed my homework to a substandard level just so I could bake the cakes or ride my bike then I wouldn't get to bake or ride my bike after doing my homework any more. If I got a difficult project in a subject I didn't enjoy and I told my parents about it as soon as I got it, they would do whatever I asked them to help me; if I lied about it or put it off till the last minute, then they wouldn't help and would leave me to suffer the consequences at school of not having done it. That taught me to be honest about work I had and instead of burying my head in the sand and pretending it didn't exist, I learned to motivate myself to get it over with early so that I could get extra help, if I asked. If I did well in a test then I would get praise and perhaps a treat - chocolate cake for dessert, first choice of TV show after school etc - but if I failed a test purely because I did no work to prepare for it, then my parents would be disappointed and I would have to stay in and they would help me to study for the re-take instead of whatever other activities I had planned (from Juniors, my school would have you do the test again during a lunch break the following week if you failed it first time, both as a consequence of failing and to see if you had actually improved in understanding enough to pass)
Your child is going to have to do many things in life because it is necessary and not just because they want to or interests tham and you do them a disservice if you set up a system whereby their only motivation is that they want to do it and if they suffer consequences from outside entities then it doesn't matter because their parents won't care anyway nor will they change their behaviours.