Well said. I've said it before, but will reiterate it... I think the effort of managers in general and of U21 should be on making the game fun for new users and supporting them, and not necessarily trying for short term gains.
Which is why everyone should take a crack at training
I started by saying if you are not faced with relegation or promotion
training is the furthest from short term gains
its fun and your team gets better all season long
your trainees will always be better than their salaries