'overestimate' and 'underestimate' are also the ultimate weasel words, especially when it comes to statistical distribution.

Yeah, I was going to point that out.

...incels...overestimated physical attractiveness and finances, while underestimating kindness, humour and loyalty...

That is almost certainly a factual statement...yet also misleading. Incels do overestimate and underestimate those things, absolutely. The important question is, who is closer to the truth, incels or Experts? If it's not the Experts, their statements are meaningless lies. If incels (or any other group) are more correct than the Experts (usually the case nowadays), the Experts don't get to whine about the other group not being one hundred percent on the money.