Its the player that makes the ability, not the other way around.

If the player is already bad in the specific ability, its not the learn of the ability that Will make him better.

I have a great striker, and the ability he have is corner specialist. His rate of penaltys is 100% in 4 seasons and in free kick is 7/8 in 10 attempts.
28 goals scored, 32 assistes, 15MOM