Long late-night post alert ...
I think it goes without saying that there is an objectively factual world, with many near-inviolate truths, and then there's everyone's individual perceptions of the factual world. Younger people are learning that facts don't necessarily exist outside a person's perception; reality is created in the mind.
Example:
When you & I look at a colour, we can never be sure we're really "seeing" the same thing. We might not even agree on whether it's green, blue or teal. You might find the colour horrible and I might love it. All the same, it has a Pantone reference which identifies the precise wavelengths of light it reflects: it's an unchanging reality despite our differing perceptions and opinions.
Another, with apologies to Buddhism:
A tree falls in the forest. If nobody's there to hear it, does it make a sound? It does set off a chain of percussive reactions that, if you could hear it, would constitute a sound. I say this means it makes a sound. You might say a percussive reaction isn't a "sound" unless someone hears it.
This has all been a jolly interesting debate for philosophers down the ages. It encompasses the nature of the world, human experience, social movements and religion, among other things. Current philosophy considers four types of reality: personal, social, objective and shared objective. (Different philosophers may use different terms, I just like the way this author wrote it.)
For reasons that still escape me, young people are being taught in schools that their sex is more a matter of personal experience than a material fact and that, further, there's a spectrum of sexes to choose from. The idea that there are four realities - three of which are created in the minds of individuals and groups - is gradually infecting all areas of life and thought.
I've had some extremely frustrating talks with twenty-somethings whose take on everything, including basic science, is "It it what I say it is!" Resorting to proof gets nowhere, because it's my perception of the evidence and my perception's no more valid than anyone else's.
A really common manifestation of this type of thinking is "Literal Violence". Speech can be hurtful, that's why we have expressions like "sharp words". The hurt a multi-reality thinker feels is the exact same as a physical pain, therefore a rude or upsetting comment is actually violent.
I can't help thinking that believing you live in a sort of Matrix must be destabilising. If your thoughts & feelings create the reality around you, that's a hell of a responsibility. Your creations then have to be validated by other people in order to exist a bit more definitely, so your entire world genuinely depends on sharing the mental perceptions of people around you.
It would drive me fucking nuts, and I'm not a young person still learning how the world works! I'd love to know what happens when material facts slap these kids in the face, but I imagine it can't be pleasant.