@2ND Necessary or not, apparently it is for him. And you can't say for another person how he should react to what exactly and when it's overreacting. Since all of us have different things we consider important. For example manga writing and designing a story is not that important to me, but for an author that makes it his purpose in life I am sure it's a totally different story.
As a similar example, imagine a man that gets betrayed horribly by a woman and decides to never trust or date another woman ever. Even if you do not think the same at all, for him it is something that may never be fixed for as long as he lives.
So yeah, the point is that it's impossible to measure someone else's traumas compared to how we would feel regarding that same situation. I would agree that his aversion is excessive, but again I do understand it completely 😑. This is also why people get depressed for reasons that others would just brush off.