I don't believe it's the reason why they (chose) to have children.
However I suspect many of them decided that their children were not going to run their household.
The minute they sense a rebellious nature rising they want to nip it in the bud. When I was growing up all adults were to be revered as being wise, respected and thought to be superior.
It was "their house" and "their rules" and if you didn't want to follow them it was time for you to move out. There was no arguing, yelling at adults, rolling your eyes, or slamming doors.
Teachers, principals, and coaches were allowed to paddle kids who got out of line.
A lot of stuff that goes on today simply was not tolerated.
If anything I believe today's parents are a much more lenient than past generations. Adults & children are on a "first name" basis. Mr./Ms./Mrs. are rarely used terms by children today.
Some teenagers are allowed to have overnight guest as in boyfriends/girlfriends. Others can curse, drink, & smoke.
Just the other day I was addressing an issue with one of my tenants. The father called out to his teenage son who had just walked away to get into a car. The son yelled back:
"I'm (efffing) busy!"
(And by that I don't mean he said effing. It was the F-word)
My mother would have never allowed that!
If I had did that the next word I would have heard would have been "Clear!"