Well, it's not like he has not cheated before. The doubts in other's minds is his own mistake from the past.

Magnus' reaction in the last tournament where he made 2 moves and left is not helping either. If he has credible information, he should come out with it, otherwise he is putting in jeopardy the career and mental health of another player.

There is very clear evidence he has cheated before. He then admitted to it. Then chess.com says that he admitted to a very small portion of the actual cheating. So there is a LOT of evidence he is a cheater.

This is analogous to track and field or pro cycling, and it robs us of the ability to believe in the underdog.

I don't know a single person who believes that Marcell Jacobs won the 100m dash in Tokyo legitimately, and that's a sad thing.