Hasn't it essentially been established that Walcott is nothing but a glorified sprinter?
Well illustrated there by sprinting past defenders then crossing it at the first man.
Just compare Adam Johnson to Walcott in this game and it's clear how poor Walcott is. One is a real winger, the other is just some guy who can run fast and ruled youth football because he'd manage to get 20 yards a head of everyone else, allowing him 3 minutes to look around and decide what the best option was.
Walcott's done about three times as much as Johnson. Walcott can look clumsy but he's more effective than all the rest of the wingers available bar maybe J Cole.