I've been told that w***() functions (wontop(), wparent(), etc) are not OOP, but I don't understand why.

It seems to me that the arguments that I've heard could be applied to just about any function that existed before OOP.
ie: "srows()" existed before OOP, so does that make it non-OOP?
How is that different than "wparent()"?

What am I missing?

TIA