I have seen some great strikers down the years, from battering rams to fox-in-the-box types. All of them have something that cannot be taught it seems, something that applies to the very best in any position, really, but as fans the striker role is the one we focus on mainly. Wingers used to be up there but not so much these days, 'keepers are behind most of the time but not by much.
Gabbie has not got that bit of magic to be a world-class striker, imho, David Silva didn't either, still a fantastic player. That is why when the chance comes to buy a genuine world--class striker comes the price will be astrnomical. For my money Gabbie has the skill to play in the chorus, just not the lead singer.
What seems a simple task from the stands is obviously not, but why, is a mystery.