Nah mate it's simply confidence.
It's embarrassing for a striker to be going that many games without a goal. He'll know his teammates will be questioning him, the fanbase questioning him, his peers looking at that record and thinking its embarrassing.
He needs to be dropped because the things he does do well when he's not scoring - working the centre halves, working the channels, occupying defenders, a nuisance in the air....he simply isn't doing it enough. He's not working hard enough and he's hiding in certain situations and not reacting to loose balls, little things that chances can come from.