I mean, people are doing dumb shit since the beginning of times and I considered this society as messed up since way before LLMs.

And yes, humans as a whole are not even ready for cars or nuclear weapons. We build and used them anyway.

But my brain is still pretty busy and I don't think the younger generation is getting dumber because of LLMs, rather mindless consuming TikTok and co

LLMs are a also great learning tool and anyone using them should know their limits quickly. Not all do, though. That is obvious.