The problem with this argument is that it doesn't have a lot of substance. If Walcott had had two or three amazing seasons before his ACL and people were just writing him off then Yeah I get it.
But the fact of the matter is that he's only ever had one season of note in a decade at the club. It's like the worst blue balls ever. I've been waiting for Walcott to finally "come good" and reach his ceiling for almost literally half my life and now he's so old that he likely will never develop much more than he has now.
He's looked good the start of this season but we haven't been paying him £140k pw just to look good lol
Its like the Bendtner saga. He was here for like 7 years before Wenger (and I) realised he was just never going to amount to anything no matter how desperately we looked for any evidence to back it up.