Is factcheck.org Safe?

This article here: https://www.factcheck.org/2019/06/fake-mark-twain-quote-mocks-voting/ is a perfect example of why this is a completely untrustworthy site. There is no way (short of going back in time and following someone around their entire life) to factually claim that someone did not say a particular phrase. It is only possible to suggest there is no (currently known) documented instance of them saying such and such. So, to claim that an accredited statement is patently false, is misleading, at best. Then the site suggests what Mark Twain's political beliefs were based on one single quotation, taken completely out of context, again, misleading, at best. This site seems devoted to controlling information, utilizing mechanisms like "opinion" and "interpretations" (with and without obvious bias), and less on actual fact. Which seems less than transparent and devoid of journalistic integrity. Avoid information provided by this site at all costs...

I'm still surprised of this website's overall note is at 4.6, at the moment, although, when I compute the mean by myself of the 17 last comments (that I can see), is of 2.44. I guess This website was good in the past, but something happened around March 2020.