Learning little tiny basics is one thing. Totally integrating everything, laying out every tile of railroad tracks, every tile of convoy roads, every bridge, so that they all work perfectly, so that strats resupply fields, so that fields are numbered properly, to get an entire MA map up and running is far more demanding than "just" playing with custom objects.
Try getting one of your maps in the MA, then maybe I'll listen to your thoughts on the matter. I don't have any myself, but at least I've tried. Many have, and have given up. Those that don't give up spend literally years on a single map sometimes. Try to tell THEM it's so easy, eh?