Real Madrid even have a very brilliant reserve team and why they are yet to effectively put that to use is another things really don't understand and do bother about sometimes, I think it will even be better if they can rest some of this bigger players awhile like they did last season and allow the reserves to play few games as the key players are stressed already, they have the stress from their club side and Still gets almost same from their country sides too when the needs arises so I believe they will get fatigue and injury prone so it will be ideal they are rested at some instance.
Yes, I also agree with you that Madrid have a better bench, but the coach and the standard of the team can’t trust these young players because they will not want risking them since they don’t know if the boys will make them proud.
It is very wrong to be keeping potential players on the bench even when your team is suffering from injuries, and I am sure they will sign some world class players during the transfer window instead of given these young players chance to play.
Madrid is not good in bringing up players from scratch, they always believe in already made player who has already made name for himself, they will sign such players no matter how much because they have enough money to spend.