I never said, that it is impossible to work without operator overloading (actually the opposite). Just that it is a very common feature in most programming languages, and I don't understand why an experienced developer would be confused by it. Even in maths expressions (where the operators come from), you have this behavior. If you multiply two matrices, it does something completely different. The result could be huge and thus in computing world require huge memory allocation. Also you can multiply matrices, but you can't divide them. The primary school level math you seem to be limiting the world to is not practical.