It's a maturity thing isn't it? Where maturity doesn't mean age but experience/world wisdom.
To begin with it all seems fresh and new and generous and oh so progressive and it feels lovely. It's exciting to be that new generation that goes into the future where they know more and see differently and everything's all lovely and equalite and liberte and fraternite and it's like dancing with the hippies in central park.
It's only when you start to notice and think about and understand what's going on inside it, that you start to see and have to admit to yourself that there are many who will take advantage of less boundaries and are not thinking about lovely values at all but how to use other people's naivety to hurt and do harm and indulge themselves at other people's expense.
And that your parents and previous generations weren't joyless, prejudices and stupid old gits stuck in old fogeyism. They just had a fuckton more life experience than you and understood why boundaries mattered and what they prevented.