See, this is my hunch too, but if there's one thing we all know about football it's that it's a funny old game and unpredictable outcomes are actually fairly common. If the recruitment team think he still has plenty to offer, I think he's worth a punt.
Sometimes all a player needs is a change of scene to improve his fortunes and it will further help if he has extra motive to prove himself, like fighting to get his England place back and dismissing the criticism of the Bournemouth fan originally quoted.
There's also the advantage of joining and not having the pressure of being solely responsibile for scoring our goals if Watkins signs, which should also help.