What are these obvious scientific facts? Being honest I've only ever heard people complain about not being able to say "obvious scientific facts" in reference to specific beliefs about transgender or gay people.
Popular things for getting into trouble over seem to be there being two sexes of which you are probably born one, heritability of IQ and until recently the origin of covid though I think maybe folk have chilled out a bit there. Also I got some grief for saying natural immunity was likely as good or better as vaccine acquired.