Either that, or you add other tertiary skills like stealing or clutch skill and make it known that these skills are of far less importance. In all fairness, skills like driving and handling are only secondary skills and no one complains about them. (I recall a player on the TL with legendary driving and handling to go along with average guard skills who was only putting up about a 6.5 or 7.0 rating.)
lot of driving ain't useless, but players with just one skill are useless ;)
In the german Bundesliga, the best scoring player all have great driving and driving cost enarly no salary and the training improves secondaries pretty good as well. So the balance is much better ... The top german team, makes their guards superior in just training driving, could you do the same with Shotblocking?
And thats SB is part of id is the reason many people train it in expection that it help the players, to get better.