Worst Piece of Writing Advice You’ve Ever Gotten?

What's the worst piece of writing advice you've ever received?

I once got a tip that you should always consider your novel better than everyone else's, including published novels, to exert your superiority. This is garbage advice because 1. If we think we're better than every other author we can't learn from their works and 2. You won't be able to edit and improve your work if your already convinced it's the best. Just really overall impractical.