I'm not sure about it being a s*** move for his career. He could start for them
Same could be said for Schurrle and Cuadrado and Luiz Filipe and De Bruyne and Remy and Salah and Ba. They're a super rich club with no interest in progressing the careers of any player, no matter what age. You're in, you get a chance for ten minutes, and then you're out when Jose has decided he's bored with you.
Not really because of Mourinho, none of those players fit into what he wants from those positions. This is nothing like that and not comparable at all, if he doesn't start straight away it won't be long till he does.