I'm not going to pretend like I don't miss having 5-11 PM for myself, or the fact that weekends tend to be quite busy. But I've done the "all non-work time is _my_ time" for my previous 38 years. And I've also come to understand that the luxury of time I had previously I was also quite adept at BS'ing myself about: "I'll start that tomorrow! never starts it"
If I don't work on a side project, I understand very clearly now it is because I didn't sit down and actually do it.
It's not my son's fault, it's my own.
The 5 year old is in his "big boy bed" and we use a color-changing nightlight on a timer that is a soft red when he needs to stay in his room and turns blue when he can come out. The 3 year old is still in his crib for another few weeks, then we will transition him to the same setup.
Apart from the predictable times here and there where the older one sneaks out of bed to see what we're up to, it's worked out really well and gives us our sanity back from around 745pm to whenever we go to bed.
That said, I agree more with you, because as much as I like to say, "oh I could be doing x or y if I weren't caring for my kids," in reality, I probably wouldn't be doing much differently. Maybe I'd go out a few more times a month, but oops pandemic.
If I don't get a solid 2 hours a day I get very unhappy, very fast. So long as I get that, I'm good. But that's about all I can manage these days.
My kids are asleep by 830 or 9pm, I'm not sure why this person feels they don't have free time until 11pm, that seems like an exaggeration to me.
Even when they are awake, they rarely occupy both my wife and I full time, unless we're choosing to spend quality time with them. Sometimes just one of us watches them while the other one had time to relax or catch up on work.
It's not like my wife and I were globetrotting before kids anyway. Having kids is far more interesting than the same old, same old routine. I don't really feel like I'm missing out on things I would have been doing before kids.