lol, my god, what gymnastics...and I thought you were done talking about Gnabry here?
Mate, it's really simple.
Is he better than Ox? Yes, and has been for a while.
Would he help Arsenal right now? Yes certainly, only debatable how much.
Because he literally just turned 22, he's missed two full seasons (one due to injury, one due to Tony Pulis/Arsène Wenger's bad loan decision). To have done as much as he's done given that actually speaks to his quality, not detracts from it as you and others are trying to do.
I don't see why you lot are so determined to look for any reason possible to take away from the kid. It's a bit odd. I guess it's probably to save face after the debate last summer? (With Oliver I'm sure it is, with you MM I don't really get it).
The judge players by 23-24 thing is a Wenger invention. Better results at younger ages= better projection. Obviously there are all kinds of career paths but on the aggregate that is undeniably true, and age 23-24 is not some magical cut off. Ox started to show in his age 24 season that he definitively was not a winger and was a superior version of Victor Moses. Gnabry is already much more than that.