[JMStewy]

That's true for hold'em, but in stud variants you need to keep track of the cards held or folded by other players.

[sanswork]

But that's a very different skill from counting cards.

[paulddraper]

It's the same idea: predict future draws based on used cards.

[sanswork]

In one you have you remember the attributes of the cards in the other you just have to maintain a running total. They are very different skills.