My impression is that aside from some crazies who generally get downvoted unilaterally, you rarely see antagonistic opposition to saying Tesla is overvalued. This doesn't hold if you instead make a meta observation that claiming it's overvalued would earn antagonism.

It's not that surprising. The former is voicing an opinion. The latter is effectively just a pre-emptive insult to everyone who disagrees with you.

Similar arguments hold for any popular unpopular opinion.