They don't. They just think that they can't be any worse than Pickford so that'll do.
Personally I'd just go with Pickford and if he continues making regular errors then drop him for Lossl. Might actually do him good.
Pickford is not the terrible keeper everyone is making out. He is just making too many silly errors that are leading to goals. That can be rectified. He is still a very good shot stopper and as good as anybody in the league in one on one situations. People are just seeing the mistakes and the points lost, and not the saves and the points saved. He made 2 fantastic saves against Spurs in the first match before we scored. Everybody forgets that.
Having said that his performance at the weekend was probably his worse yet and there's no doubt the mistakes are making him more edgy.
If I was Carlo I'd be getting a Sports Psychologist in to work with him.