1. We have them in the squad because it is currently depleted, often injured, and the youth are, effectively, our reserves. Looks like a mistake to me.
2, 3 & 4. These 90 minute intervals youth players get are what they live and dream for. Playing time influences them. What they do on the pitch defines them. Winning and losing become habits.
3. We shouldn't expect these kids to save the say. It's not fair sending them on when United are down in a match, expecting them to even the score.
4. When youth prospects are on loan, no one expects them to save the day. The don't have extraordinary pressure piled on them. But when they're called the next Van Persie, or next Messi by home fans and journos they get too much pressure piled on their shoulders.
I tried to answer all your questions but you made it hard by interleaving questions with points.
1. We have Greenwood in the squad because Ole decided he is third choice this season and he wants him to have game time. Therefore; he let Lukaku and Sanchez go (different convo about not replacing them)
What this tells me, he has faith in the youngster and has had a chat to him about it too.
2. Playing time influences them yes, but what I am saying is what is the difference between him coming on for 30 mins when we a goal down to him playing the full game? He isn't going to influence much in 30 mins ? why not just give him a game ?
Greenwood has already come out this season saying he is not used to interval playing time, he is used to playing full 90 mins.
3. The last point about pressure, when a player produces numbers like he has in the youth league, there will be eyes on him and pressure because he has done so well and this comes with the territory.
I agree it is unfair but when you are talented, it is not uncommon for players of his age to start games.
e.g. CHO, Sancho, Mbappe, TAA, Mount. This is to name a few on the top of my head but across Europe there will be alot more.