You’d never send players out on loan if that was the case as we’d always have better facilities coaches than lower league sides.
I can see the argument that if he gets 30 min run outs for them then that’s better than 90 mins at championship level.
But training doesn’t have the risk factor that real games do.
I get your point that game time is important. But to a player like Lookman I really think he's better off with say 15 mins in a top league that 60 in a lower league where they'll boot him everywhere due to his style