There is no pretense here that closing the source is the only alternative. It's only the alternative the author has chosen.

For better or worse we live in a society. Even being perceived and having a simulacrum of you in someone's head, much less a collective simulacrum in many people's heads is restrictive. Every facet of yourself you reveal to is another string tied upon you. I'm not here to argue one way or another what you should do, but it is not self inflicted, it is a fact of social existence. Even to have the discipline to ignore an email can be taxing, especially if you view the person on the other end as a human. Just being made aware of a bug, or a different way of structuring things is an infohazard if your goal is to just have fun doing things your way. I think closing the source like this is a fairly drastic course of action, but there's plenty of things I've written that aren't open source for the same reasons, even though I'd like them to be, I'd rather be a hermit about it just because the vibe is better.