I don't think the world changed fast enough for this to matter until the last century. Now the pace of acceleration is so rapid that it's way more noticeable than ever before. Struggling to see that in the 17th century there were jokes about "when I was a lad".
Will it always be that way? Only if we persist in seeing older as wiser with no pushback. If older people were truly wise, they'd stop thinking the past was the way forward.
My counterpoint to your last point would be "if only the youth would pay attention to the lessons of thier forefathers".
The whole "doomed to repeated them" thing
oh and read more bloody history so that they don't go on a rampage pulling down statues of people they think are the sole reason for slavery in the 16th & 17th centuries when the black people themselves have a lot to answer for in that regard (and the arabs and pretty much everyone else - oh and the christians advocated it as well, go check for yourself - have they ransacked any churches? nope.)
One of the reasons why the youth get such a bad rap is simply because they almost ALWAYS fail to take all aspects into account - one of the reasons why a lot of society is shaped by thier elders is because they have learned (mostly from bad experiences) that the situation is
far more nuanced than most youth is capable of grasping.
Take Greta Thunberg for example - she is just a mouthpiece for those doing the talking, OLDER PEOPLE, she may have started on her own, when no-one was listening, in an "outraged precocious child" kind of way, but once she started getting traction, you think she's writing all those long speechs by herself? Get real, she's getting help, a LOT of it, from older, more experienced sources.
Youthful exuberance only gets you so far, after that you need wiser, more experienced hands - ignore those and your failure is certain.
Here's a question - whom is the youngest world leader today (not including any Dalai Lama style resurrected 5 yr olds)
nvm found it - youngest of someplace important is Austria 34.5 yrs old (ruled by germany mostly IMHO), North Korea (nutter) 38 and NZ's Jacinda Ardern at 40.
While 40 isn't considered "old" by modern standards now, it's plenty of time to get some mileage under your belt (or skirt in her case

) The majority of western people under the age of 30 really don't have much of a clue about anything - they THINK they do, but they don't.
Whomever mentioned it about the asians being serious about their future and subjects studied, he's right 100% - they don't study "art history" because an "art history" degree is a fast way to poverty and starvation.
They don't study
what they like, they study
what will get them ahead. This is the fundamental reason behind Asias explosive growth economies.
Western "art history" or "classical literature of the 1500's" or "abstract dance" or "the life and times of someone we've never heard of" is also the reason why western society is struggling to keep up . (and also why until not very long ago working class northern men would refer to "that lot in oxbridge" as "a bunch of ponces").
Can't expect to stay in the game if you don't understand the rules of how to win and too much ground has been given already to the bleating voices of those whom want to study "art history" on the taxpayers penny that has led to an almost complete annihiliation of trade apprenticships and places to learn the trades.)
The YOUTH did that, not the old, and only now 20 odd years later are they realising thier monumental mistake.
Give the world to the young to control? no thanks.