Do you ever feel too stupid for the field you're writing about?

Exactly what the title says. It's understandable that not all fanfic writers are historians, nor scientists, nor doctors, nor lawyers, nor part of whatever culture the original work is set in, et cetera. And nor should it be a requirement, some people do research or base their work on established facts in canon, others just go wild.

But if you are the type who strives for accuracy, do you ever feel like you're too uneducated for the field despite how much research you do and fear some readers might notice? Or that you might sound mediocre? (yes I'm part of this)

Also feel free to name the fields your fanworks are based on!