I don't see any fanaticism here. He's obviously good enough to play and looks no less promising than Pedri, but is treated diametrically opposite than the later for some arguably petty reason. It must rise question among fans, especially in the times like these, when team is struggling, has limited squad with a lot of injuries and players in bad shape/too old to give quality performances therefore it would be wise to exhaust all the potential possibilities. I think even in stacked team he would get more chances even if for rotation reasons alone, but in current times his services seem to be much needed, which is why a lot of people are frustrated by his status.