It's a little subtler than this. You want it to be easy to not handle an error while developing, so you can focus on getting the core logic correct before error

It's a little subtler than this. You want it to be easy to not handle an error while developing, so you can focus on getting the core logic correct before error-handling; but you want it to be hard to deploy or release the software without fully handling these checks. Some kind of debug vs release mode with different lints seems like a reasonable approach.