Macros aren't the only thing that make wxWidgets like MFC. Things like using new but not delete on objects. The method and event names. The use of DCs in paint events. Etc.
Well, there is only so much latitude for naming the event (or message, callback, whatever) sent when a window needs to repaint itself. Qt has `paintEvent()` too and nobody calls it MFC-like AFAIK. IME people mostly think about event table macros when they say it.