Disease outbreaks, dangerous gas/chemical environments ... Several good reasons.
Hiding their identity is not a good reason tho, to be sure.

Not trusting anyone over 30 is confusing and tricky when you're in your 50s.

As Gen X let me just say ...... Is that really something we WANT? heh heh
Just skip Gen X and go for millenials.

There may be universal magnetism shaping cosmic structure, bypassing the SLT and making DE and DM emergent byproducts, not drivers. Fractals reveal how form arises from simplicity, often mirroring reality. The universe may be 13 trillion years old, that'd explain a lot.
I need help developing this.

Hit a nerve? No, you just sound like an ass and you're being called out on it.