And what would be the problem with that? You still have to take care and shift players accordingly to get full training for your young prospects, but it would end this ridiculous minute gambling. Please do not just disagree on anything. It is a constant discussion on that "problem", so I guess the BBs shouldn´t ignore all that.
Yes, there are some reasons to keep it that strictly (48 minutes or you lose training), as managers more often have to decide then between success or training progress. BUT, the annyoing thing with that is, that even when you make your lineup optimised to the training minutes and therefore give up a match sometimes, you still get fooled by your coach´s decisions often enough, especially late in the games. And that just kills the fun, at least on the cup/ friendly matches and as well on all matches where you have a garbage time fourth quarter. So why is it all negative to think about a solution to make it a bit easier to get full training, as you as the manager do not have all the control of played minutes of your trainees.