You’re probably not very good at playing the piano. I’m not sure what you mean by far enough, but not being able to sight read a piece is not the same as being unable to read sheet music at all.
[1] This is an understatement, by the way.
This is rude. What the heck do you base this on?
Even in the poster child of learning by ear, Jazz, something like 99% of session and pro players learn to read music.