Which really says more about how good their previous teams were imo.
As said before I understand this as a part of the rebuilding process but OTOH you can't win building a team like this. Maybe for Euro 2024 (if they'll find a striker until then) but not for Euro next year and probably also not for Qatar 2022.
Sure to an extent, but the truth is this current squad is mediocre AF. Basically no world class players. Their biggest star except for Ramos is Thiago who at 29 y/o has 39 caps.
Looking at the current squad there's an age group that's missing, it's the players who came up when Xavi and the guys were the bosses.
Some have full on not been good enough, but others could have contributed with their experience.
De Gea, Carvajal and Thiago are those who are still there. Then you have players like Isco, Koke, Saul who should take a spot in this squad.
Luis Enrique's favourite Alba is still the best Spanish LB and could probably have Azpi as well for some much needed experience.
Asensio could provide some danger in attack too.
But the truth is many of the supposed future starters who were successful with U21 have been disappointing.
I looked through some older squads to see what 'youngsters' were there, they would basically be as much of squad players now as they were then: Nacho, Bartra, Odriozola, Vazquez, Bellerin and Morata.