One mentality that really bothers me, is an uncritical assumption of how behavior is received by others, or at least whether it's effecive.
Often not even the question of "do I find this appealing/pleasant" and especially not "why would others react positively".
Only "confirmation bias" rationalisations on a kitchen sink (evolutionary) psychology level.
One big example is how people "behave like a wannabe influencer" on social media.
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Edited 14h ago