There is no such thing as a child - they are all different, just like adults: not moldable, pliable .
Interestingly, a big predictor of an unhappy home with behavioural and psychological difficulties is psychological inflexibility on the part of the parents - an inability to respond adaptively to the challenges that arise e.g. parenting a child you thought you'd like to have instead of the one you got. So consistently and persistently insisting a child will behave a certain way when how they are behaving is actually entirely normal (often means blowing up over tiny things and neglecting to respond effectively to signs of distress), controlling their interests, being harsh/critical/judgemental, not contingently responding to their needs (e.g. insisting children stay awake when they are sleepy, don't eat when they are hungry etc), not being willing to make changes when what you are doing isn't resulting in your child thriving.
In many cases, this sort of rigidity comes about when people are very highly stressed because of life circumstances but it also happens when people have impossibly high standards and a streak of perfectionism.
And yes, lots of people WERE parented like that - and it results in a lot of adult dysfunction, depression, anxiety, addiction and emotional disorder. So not to be recommended.
There's also the important point that there are ages and stages. We have three (6, 4 and 2) and at this stage the amount of time they can occupy themselves is increasing all the time, almost on a week by week basis.
So we are getting out more and the oldest one is even developing his own little life entirely separate from us with school, playing out, birthday parties, playdates etc.
However, when they were 4, 2 and 0 there was NO LIFE and the whole world revolved around eating, sleeping and keeping them effectively occupied/soothed so that life wasn't a constant round of screaming.
And it's likely there will be other busy times - perhaps when specific peer difficulties arise that need a bit of adult support, or there are two or more doing exams etc. It just ebbs and flows. But as in any part of life, setting strict rules about how to respond to a huge number and variety of unknown situations can lead to insensitivity to contextual demands in ways that just make everyone miserable, so not a good way forward.