People want more/all the players in the draft to be trainable.
But there are at least two problems with this:
(1) It is impossible. Every team needs, as average and disregarding trades, one new player every two seasons. If the draft gives 3 players every season, only one sixth of the players will be trainable.
(2) Supply and demand law. If you make more/all players in a draft trainable, then by supply and demand law, the value of trainable players will plummet. The draft process will lose its interest because you will get a trainable player anyway.
So face it, most of the players in the draft have to be scrubs, just as it is now.