Do you think Kolo, Clichy, Sagna,Navas, Delph are in the top 5-10 players in their position? Yet they have still represented the team 20 or 30 times this year so why should it be different for a young player?
Players will go on loan that's logical but even at loan level it's unlikely they will play at the highest standard but that should not be the only route.
The league is full of players who have strengthened sides coming from the academy or with limited experience. Players like Rashford and Kelechi who came straight from the academy.
Kane and Alli who had played at lower leagues which is hardly the highest level were hardly top 5-10 players but have still contributed significantly to there team and progressed as a consequence.