Some professional poker player told me this anecdote: he was playing at a table with a celebrity. He quickly noticed he has a tell (he did something with his chips when he had a powerful hand or was bluffing, don't remember), and half the table also noticed the same or similar tells. They proceeded to clean his stash.

At the table statistics matter between pros, but if you are not aware of your flaws, you might as well play with your cards face up.