The linear aspect is more about the positional nature of the player rather than 'hidden factors'. Striker 9s are commom compared to DMC & MC because DMC & MCs have more opportunity to be punished.....imo.
I appreciate an MC that gets 4x8 more than a ST who gets 4x9 - but the ST grabs the glory in winning the game.
Hidden factors will determine isf a player is able to perform but the rating tells you if he did (or didn't)........imo