I don't agree. I've seen many times since he's been here when Anderson is in a purple patch, he'll suddenly be left out of a big game and lose his place and have to start all over again. You can't do that with a confidence player and that's most certainly what Anderson is. Same with Nani, in fact.
Yes, they both have had attitude problems that have held them back also, but to an extent, they have been mismanaged, too.
I understand the boss tries to pick the right players, for the right games etc. and we need to have squad rotation or whatever. But I am a firm believer in staying with your in-form players, no matter the game. In fact, when three points are at stake, you should be picking your best XI, available.
Saying all that, I dare say the manager knows more then me and I trust his judgement implicitly, even if I don't agree with it.
Maybe he's always known Anderson would be a very late developer and has been biding his time with him all along.