Earlier quoted context omitted.
CFR was something like 1% early on, and higher in Wuhan where there was a partial collapse of health systems. World population is >7 billion, so 1% gets you 70 millions deaths. If hospitals collapsed and treatments hadn't been found, a not inconceivable 2-3% fatality rate would get us to "hundreds of millions". (This estimate is unrealistic in other ways though, e.g. communities would begin imposing their own and hoc…
No it wasn’t. The samples just weren’t random samples.
Also, take into account the amount of diseases that are getting late treatments due to healthcare saturation. I don't know of any formal studies but you only need to talk with any doctor to see that they're consistently seeing diseases in later stages and therefore harder to cure.