Corollary: If you see death coming, or e.g. you have a near miss and know it was only by chance that you survived, then now’s a good time to change your beliefs. Which, actually, seems to be a thing people do. (Though there are other reasons for that.)
You haven’t mentioned the strongest argument for not updating your beliefs: You aren’t dead yet.
The beliefs you hold now have not had fatal consequences (so far, at least). The same is not guaranteed if you change them.
Corollary: If you see death coming, or e.g. you have a near miss and know it was only by chance that you survived, then now’s a good time to change your beliefs. Which, actually, seems to be a thing people do. (Though there are other reasons for that.)