How so? Because the community collectively refuses to host antivax or climate denialism propaganda? You can find these subjects on there btw, just with a mention correctly labelling them as falsehoods.
I'm yet to see conservatives bring up a single subject that Wikipedia allegedly silences out of ideology, that is not an obviously false conspiracy theory. In this, Wikipedia may appear to have a left-wing bias, but only because the modern right has gotten so divorced from reality that not relaying their propaganda feels like bias against them.
