Why would it be irrelevant though? Playing regularly in a competitive league where he may find it easier to develop some of the areas he's currently lacking would be fairly relevant in my opinion.
Why exactly is Tammy Abraham a case in point? He did very well in the Championship, and is now playing regularly in the PL and has 2 England caps to his name. Seems like the loan did him the world of good to me. Even if we accept him as a good case, there are countless examples of players who've had PL loans and not progressed. Galloway being an example very close to home.
As I said, i'm not convinced we'll be loaning him anyway, but I can certainly see the logic in him trying to learn in a slightly less demanding environment rather than struggling to keep his head above water at a level that currently seems slightly too high for the lad.