Scholes was done by 30 was he?
The bastard won 5 league titles, 1 Fa Cup, 2 League cups and the Champions League and played 303 games in his 30's.
Tell me how done Gareth Barry was at 30 as well? Started playing at 17. 250 games after 30.
Frank Lampard? Started playing at 17. 348 games after 30.
Ryan Giggs? Started playing at 18. 420 games after 30.
Gerrard? Started playing at 18. 220 games after 30.
Truth is, the only footballers who have had a career curtailed by an early start are the likes of Rooney, Owen or Fowler who were undroppable first team members at 17/18.
No one is suggesting that so your entire "too much too soon" argument is rubbished. 10 appearances of the bench in the league and half a dozen cup games are not going to do any harm.
It's just another excuse for people looking for reasons to not use him.