There’s a lot of education that can go into being a writer. All those workshops, retreats, seminars, and conferences; there’s enough of them that just taking in a small percentage could be a full-time job.
There’s also the less-formal education, that involves just listening to what other people think of what you’ve done. That’s always necessary, because writing is nothing without its audience.
But it matters who you listen to. Not every opinion matters, after all. Harper Lee knew that. Listen to this, from one of her letters (written after To Kill a Mockingbird was published) that are being auctioned off next week:
…one is not supposed to be aware that critics, reviewers, and English teachers exist.
All those people have their place, of course. But their beliefs should probably only be taken seriously in moderation. Especially by a writer who’s just trying to write.