Good point. It's probably more accurate to say it is biased to whatever opinions benefit the YC business model (which is understandable. It's their forum, after all). For example, speaking out against anything other than very lax immigration policy is verboten because driving down American labor costs benefits VC's. Saying anything positive about the previous president will get you downvoted immediately.
(This isn't related to my personal political opinions, I'm just using it as an example.)
(This isn't related to my personal political opinions, I'm just using it as an example.)