Societies don't necessarily progress linearly.
I was thinking about that earlier and is very true. No two societies are the same either, they contain the same components (or at least some of them), but are arranged in different ways.
To the point about parental rule. It is easy to judge the extreme at either end. The middle is actually working fine, in nearly most societies. Regardless of what one might think.
I'm a designer too. I don't see it the same way. I'm here to help one group communicate to the other. Design is about communication. I think those who worry about breaking boundaries are often elitist, concerned with only themselves and
their ideas. Ok it works to be this way if you want to be at the fore-front, but you should always question yourself to check that you actually are.
For me, the key in family life is communication. If you can correctly communicate yourself [to others, including parents] then you will be able to move forward as an individual. To break the mold of a culture is too much to ask of people. Time will sort out what works and what doesn't. 100 years later...