Let it crash, so that if something goes wrong, it does not do so silently.

Let it crash, because a relevant manager will detect it, report it, clean it up, and restart it, without you having to write a line of code for that.

Let it crash as soon as possible, so that any problem (like a crash loop) is readily visible. It's very easy to replace arbitrary bits of Erlang code in a running system, without affecting the rest of it. "Fix it in prod" is better than "miss it in prod", especially when you cannot stop the prod ever.