Initially, yes, but how is a manager (or the supporters) ever going to find out if said youngster(s) are ever going to cut it in a competitive game if they’re not given actual experience? Joe has put these youngsters on the bench, so he must be happy in his mind that they are good enough to be called upon, if necessary, otherwise why are they there?
A training session is never going to be anywhere near as intense as it would be during a competitive match, with real tackles flying in and 11 opposition players doing what they can to stop and frustrate you from playing well. Not to mention the added frustration of having to deal with shit refs and linos who make the wrong decisions which impact on the player, and which they would never experience during a training ground session!
Its pointless to me to have say, Bryan getting injured at left back (with Wallace already out injured), and a player who isn’t a left back is brought on, or forced to change position on the pitch to go in at left back, when someone like Adom-Malaki is on the bench for that specific position and purpose!
I get managers sometimes want to play it safe and believe putting an already experienced player in a different position is better than using a raw recruit, but how is that raw recruit going to get any experience and used properly in future games if he’s not playing competitively? This chicken and egg scenario has to stop and some trust has to be given. Only then will everyone know what sort of player they have and whether he’s going to succeed or not!