But why? I don't get it. You call something. It can break. It will break. Treat it as such wrt to resources you've allocated. You can ignore error details here.

But why? I don't get it. You call something. It can break. It will break. Treat it as such wrt to resources you've allocated. You can ignore error details here. At the highest level of your application (and at a few critical places, executors, retrying strategies etc) handle all the exceptions you know of, and implement a sane default for everything you don't know. Done.