[flohofwoe]

It's important for reading other people's code. When I see a function call then I know that "anything" can happen inside that function, so I better investigate. For anything that's not a function call it is obvious what happens under the hood.

In languages like C++ I potentially need to check every operator if it is overloaded, and find the place where that happens (I think I haven't seen any IDE support to help with 'resolving' overloaded operators, but maybe that has improved in the meantime).