Why does everyone absolutely need insurance?

Nowadays insurance costs upto 5000$/month with high deductibles and plenty of bureaucracy and paperwork.

I have decided to not get any insurance and negociate directly with healthcare provider (They almost all give you huge discount if you pay cash so they don't have to deal with the insurance backdoor deals). If you FIRE anyways, you should really consider medical tourism and do major procedure abroad.

Everyone is afraid of a catastrophic 1M$ one time event. I get that. But if you end up paying 50k$/year in insurance cost for 30 years that you could have invested and compounded instead, do you really need insurance? For that one-off event that you could have saved for instead?

I guess my view is that I'm also ok to have a 0.1% to go bankrupt over this. We all got brainwashed into getting insurance at absolutely any costs. It is clear to me that it is not worth it at the current price.