This can apply to pretty much everything.
If you grow up with Miracle Whip, you’ll probably think it’s better that mayonnaise.
If you live in a capitalist country, you probably think capitalism is best. Ditto communism and every other flavor of economics.
Ditto again with forms of government. Americans are absolutely in love with democracy, though they’ve understandably not tried anything else. People in dictatorships often, if asked, say they prefer it that way. Constitutional monarchy, same thing.
And then there’s sports teams, and school pride, and state pride, and national pride… the idea of school pride always fascinated me. “Aren’t you proud to go to Townsville High?” “It’s the only high school I’ve ever been to, so…”
It seems like, in most things, when we think something is the best we’ve not actually experienced anything else. It’s “the best” because it’s “mine.”
I’m not interested in discussing which of any of the above are the best (I posit none) I’m interested in whether this has been studied and has a name I can throw around when I’m on my next misanthropic bender.