I don’t see how it shows he’s mentally fragile at all. Choosing to leave a toxic environment does not mean a person is mentally fragile. That’s a horrible take
For NHL hockey if you can't play under a high degree of stress then playing for a team in a Canadian market or even a team that is aiming to go deep in the playoffs is not for you.
You need to have a high degree of mental toughness for that and not everyone is cut out for that.
For those players, NHL markets like Arizona and indeed Seattle are a better fit.
Nothing wrong with that.