100%.
Guarantee you that if Barker, Maffeo, Angelino, Gunn, Bryan, Celina, Pozo, Ambrose, Evans, Ntcham etc were United or Arsenal players they would have had five games each at least by now at United or Arsenal, some maybe with more, because they give kids a go in cup runs and use them as the odd impact sub. Call that step 'A'. This obviously then starts to slowly prepare them for the age of 20 when they start to get 10-15 appearances as a squad player (step 'B') and then they usually leap up around 21-22 to becoming proper first team regular members getting 30+ games. Step 'C' if you like. But you can't get to 'C' if there isn't A & B first. You have to gradually ease them in.
Even arguably the greatest player ever did similar. Messi at Barca
2004–05 La Liga - 7 appearances
2005–06 17
2006–07 26
etc etc...
John Terry... 1st season 2...then 4, then 22, then 33.
As it stands, talented players like Barker etc will get to 20 and have 0. Thus meaning they have to suddenly leap to being good enough for 30 plus games, or we risk letting them go stale by the age of 21/22 and halt their progression.