I agree with you on your entire point, you misunderstand me
.
I'm just saying that the game gets balanced around the training points we spend now. If they lowered the amount of 'useless' skills, GK would get overpowered and they would just balance it to make GK as strong as they are now. So it makes no real difference.
Also, most players are generated with a balanced amount of skillpoints (like scouts who have pretty much all stats spread). If training could give you more useful skill-points, then it would be hard for any new GK to be better than one you've been training.