As college morphs into High School+, and society extends their definition of 'childhood' to cover up to age 25, steps will be taken to destroy the autonomy and personality of these 'children.' Children are entitled no rights, no difference of opinion from them is respected, and any degree of control over them, no matter how extreme, is always seen as warranted.
"Extended" ? If I look back 20 years, there was certainly a component of university life that was ... a bit less than adult. Remembering some Latin texts from in high school, I get the distinct impression the same could be said of Grammar schools in ancient Rome. Having (quite a bit of) wine with colleagues and even with the teachers on occasion was pretty normal. Living together was a necessity in many places, even…
For reasons that I've not figured out despite decades of study, even though all of the socioeconomic pressures which inspired the changes that came with the Industrial Revolution have gone away, we preserve their practices. And appear to want to extend and expand them, further removing the young from society, etc. The thing that worries me is that there are critical periods of brain development. And brain development occurs exclusively as a result of experience. Remove experience, and brain development halts. And miss the critical period, and that development can never occur regardless of attempts to force it to occur.
Without knowing it, we may have passed a critical period. This is just a personal guess. But it seems 2 or 3 generations ago, parents who were really not entirely mature began raising their own children. As raising children is a very challenging task, demanding a great deal of maturity from a person (refusing to let your personal desire to have the child depend upon you and need you override your duty to turn the child into an adult as early as possible), this results in them over-sheltering their child, depriving the following generation of necessary experiences for brain development, and it continues.