Thanks for the nice leading insult - works really well.
But anyway, to steal a quote from elsewhere:
every algorithm is as mathematical as anything could be. An algorithm is an abstract concept unrelated to physical laws of the universe
Computer programs are JUST algorithms, nothing more... Gears and Levers have very physical characteristics and are not abstract. Music is a much closer analogy - though there are some not so subtle differences. Music is not an algorithm that takes input and produces output (like math or software), it is output only, it's akin to a story (which can also be represented mathematically as you suggest and that is meaningless in that context) but it is nothing like software (a set of algorithms).
Software is explicitly created as sets of algorithms, music while it can be 'expressed' as a mathematical algorithm (ie an algorithm can be found to describe or create it) it its self is not an algorithm in the same sense that software is.
The creation of the art for a game is insignificant compared to the generations of math contributing to the same game - the difference is the math is reused over and over again where as the art is typically a closer to a once use item (loosely). This can give the illusion that the game is all art, but that is only because most of the math (the algorithms that make the game work ) mostly existed before the game was ever considered - but it's still there, we can't ignore it just because the 'effort' in any specific game is small.
Sure there are lots of abstractions that hide a lot of math from the average developer - but these are just a simplification of the already existing algorithms (math) and doesn't make it irrelevant.