[d1zzy]

But having it obvious at the call site means I don't even have to do that, dozens of times per day, every day.

It's something that's not easy to realize how useful it is until you actually do it. When working in a large codebase that consistently follows those rules it just makes code reading a breeze, it severely reduces the number of "context switches".

Obviously it's not the only way it can be done but it is a way and the benefits are significant.