Why does the price of a player with SA is the same that one without it?

That easy i am now Making a study about the price of players, and while you are teaching a SA or a New position to a player is value does not rise.
So players with same quality, age and MV, the one with SA traine faster that the one without SA, otherwise is value will be higher in 40 or 50 Sk converterd in price.
That convertion of SK to value, depends of level of the player, how near he is from the next star, etc.

About SA, in my opinion there isen't any upgrade of Q, just the probability of scoring is higher.
For exemple, If you player is 5 * and he is facing Dcs and GK also 5* he will probably be able to Score 6 out of 10, If the stars of the oponent are only 4, maybe 7 out of 10, If the stars of oponent are 6 maybe 5 out of 5.
Without SA that probability will decrease.
At least this is what makes sense to me.

Otherwise my 5* DC without SA dId not scored 7 out 10 Free kicks. As 1 member said before on other post, it is a matter of rolling the dices.