"The ability to plan, to focus, to organise" is exactly what you need to build programs except for the most trivial hello world ones. Interacting with people i

"The ability to plan, to focus, to organise" is exactly what you need to build programs except for the most trivial hello world ones. Interacting with people is also often part of it. Perhaps you make something with your friends (eg we made a class website for our school class where we uploaded photo galleries of our events and had forums and chat - all pre-facebook, around 2002-03). By contrast math is very individual and often taught quite bad without any interaction. You learn each type of calculation task you may get on the test, memorize definitions and proofs... And it's pretty much impossible to work on a "math project" with your friends in your free time to hone those interaction skills. Perhaps if you went to a special math focused school you could talk about math with them in your free time, in most schools that's not the case, outside perhaps discussing how to solve the test questions.