This is, because computer programming is lacking the immediate, emotional triggers that are hardcoded into our human ROMs (aka DNA) and that strongly react to music, colors, visual experience or the satisfaction of needs like food and sex.

I am a computer programmer and I am emotionally reacting to some code that I get to see, but this is a very intellectual and weak emotion compared to the ones mentioned above.

I really spent endless hours thinking about, if computer programming could ever be executed on a stage and attract many people. Found nothing yet. I believe, maybe, computer programming can only be used indirectly, by producing music and other art that triggers emotions on many people, but not by itself.

This theory of course is based on my personal assumption, that arts are defined by their ability of triggering strong emotions on the art consumer.