Because the mods and admins will get your opinions reported and deleted.. Then if you keep doing it your account is cancelled (Happened to me). So I try to watch my language. This site only appears to be PC because it's regulated but if it's not, it's on par with Youtube's comment section.
My view on this is if you can make a point without an argument go for it - I think a lot of peolple are shall we say PC/Liberal just because it is the way they are and they might think why are other people conservative/reactionary. It is like this if we remove the incendiary labels, some people are liberal and some are conservative, both sides entitled to their views, live and let live
I use both and personally I despise apple, I hate what they've become and what they do.
As someone that knows a bit about tech, PCs are significantly more efficient and customizable and can achieve more than any Mac could possibly dream of. They're not overpriced.
... PCs are just better, just trust me! And mac's can get viruses! But I'm not scared of a virus!