Programming is quite a remarkable activity:
- It has an extremely low barrier to entry
- You don't need expensive equipment
- You don't need to be in a particular location
- You don't need special credentials
- You can finding information / resources just by opening the internet
- You can learn it / do it independently
- It gives you rapid feedback (which can lead to rapid growth)
- It gives you frequent rewards (which gives a huge boost in motivation)
- It's objective and unforgiving (this is a good thing, because it teaches you how to confront reality)
- It's intellectually stimulating
- It's useful in the real world
- Corollary: you can make money or even build a career out of it
- It's badass (or are you telling me that Hackers WASN'T your favorite movie of all time?)
- Electronics (but this is basically still programming)
- Math (lacks "rapid feedback" and "frequent rewards"; "useful in the real world" is also questionable)
- Go, poker, video games (usually lacks "useful in the real world", sometimes lacks "badass")
- Juggling, poi (lacks "intellectually stimulating" and "useful in the real world")
You aren't actually addressing the arguments that people are making. No one is claiming that there isn't math involved in classifying music. Are you for example going to respond to the ball comparison in a way that isn't just dismissal or are you going to address that there are people who are very skilled musicians who aren't good at math and vice versa, or are you going to address the issue that whats sounds acceptable in music is highly culturally influenced? Repeating variations (if you'll pardon the word) on the same basic argument you've made isn't helpful.