I am 100% sure it is an INDICATOR of poor performance in the pros. an Indicator is not a fact, but when it's as overwhelming as it is, you can act like it's a fact, because you're far better off not betting against it.
Then you proceeded to list a pile of quarterbacks with ~60% completion percentage, which is a strong number, as evidence my statement is false. You used evidence that supports my claim to try to discredit it without any additional commentary.