(sorry long, wanna avoid drip feed)
I work in white collar officey work. Classic making presentations, analysing data, sort of stuff. I remember when I was starting out in my industry, working 9.30 until 6.30 with hardly any lunch break was fairly usual. I wouldn't think that was a hard week for someone at the start of their career, learning the ropes. (A hard week might be be two or three nights until 10 or 11, or putting in 5 hours on Saturday).
We work for clients, so the ethos is that we need to service all the projects that come in, but on the other hand we are a big rather stuffy company which doesn't have much of a 'hungry' mentality for work. In our office a manager polices the diary of their team and if someone wants to nab a junior, their manager will often say they can't work on your thing because they're already working enough hours (i.e. 40).
When you're senior and working a longer week than that yourself, this is very annoying!
I know that it's important to protect people's rights and to create a culture where people don't work long hours for the sake of it. And yes, if I'm working long hours that's my problem and I need to organise my diary. But there's got to be some flex, hasn't there? I'd expect all the juniors to be keen to take on a new project even if it made them prioritise work over home life for a bit. I did that and I enjoyed the responsibility and opportunity to shine. AIBU to think that 45 hours is totally reasonable level of overtime to expect in a ft job (NB not paid, can take time off in lieu but in practice this might not happen as you'd be busy the next week)??