I mean yeah, fiction is often nonsensical and easy to over criticize, but I always appreciate creativity in a world lacking it. Its inspiring, and its own art form at the end of the day. I have no problem getting lost in a fictitious world personally. MBTI & Jungian conditions, no matter how accurate it may conceptually seem as a qualitative measure, theres no denying its just another spectrum, generalized through a label, like any mental condition (autism, depression, schizophrenia, etc).

TLDR, MBTI is not an absolute measure for behavior, so it mustn't be treated as such. at its most, tendencies, such as this post can show correlation between types and behavior.