Fact of the matter is you don’t know jack about why arteta benched him. For all you know ,it could be off field /personal life matters that he feel Ramsdale might be distracted with and not in the right mental state, which i am not going to go into details to. He had a great season in the last one no doubt, but he also massively fell off in the matches of the ‘draw streak’ near the end of the campaign