Because most of these (if not all) are literally meant to placate you.
Try asking stuff about like politicians who might be dictators. When it refuses to tell label people, ask it why, and then question those answers.
Albeit I am primarily referencing Trump here, and it won't label democrats either, if you live in reality then just.. cmon.. cmon. Try asking it for, say, numerical comparisons to Hitler. Not sure about others, but Copilot will just tell you that's off limits.
It all but tells you it's meant to create engaging conversations more than anything else. They easily fudge numbers all the time, so...
LLM is only as informative as whoever is controlling it allows it to be, just like social media, traditional media, etc.
I hate how much I sound like the old conspiracy heads lmfao.