I don't know his name, but what was your opinion on that guy from Google who said we shouldn't force women into STEM for the equality, but let them do what they want (which may not be STEM.)
Is the world better off without that opinion (or fact, depending on who you ask?)
You certainly can fact check the assumptions behind opinions or their sources, particularly in a venue where the intent of the author is to influence the reader into accepting an opinion.
What happens when their moderation team decides some anti-vax nuttery is "a fact" and then bans anyone disagreeing?
As a reminder, this is a group that handed out punishments for pictures of infants being breastfed.