Earlier quoted context omitted.
I think a lot of people over-estimate the resilience of the human emotional state, especially their own. Time and time again we see regular functioning adults get sucked into objectively insane or self-harmful communities, be it the above phenomenon or 4chan crap like QAnon.
How many people follow QAnon or 4chan nonsense? You're over weighting a sheer minority of people who probably have other issues in their lives as for why they chase down conspiracy rabbit holes.
Conspiracy, fear, hate - they all drive engagement better than anything else. And since we all optimize for engagement, guess where things are heading. And no matter how resilient you are, there's some really dark shit out there. Ready to tear down even rather healthy people.