I kind of agree with you. I think music theory would be way more approachable if it was taught using intervals instead of all the weird naming of western notation. For example, everyone learns major and minor scales which are the interval sequences (in half steps) 2212221 and 2122122 respectively, but the names major minor don't really help you know other scales (excluding modes, maybe). If someone asks you to play hungarian minor, you'd first have to learn and memorize it. But instead, if you understand intervals and are asked to play 2131131, you immediately know how to play it. For me it also encourages experimentation, because there are obviously way more possible interval sequences to explore right?

The problem as others have pointed out is that most musicians in the west already know some degree of western notation, so if you're collaborating, you'll have to translate back to western notation at some point. Even if you invent the perfect notation, it's like asking everyone to switch to esperanto because english grammar is flawed. And you'll still get people defending english "well actually, it's like that because the greeks blah blah blah".

My favorite music notation flaw is C flat. It's a hack. It's an ugly fucking hack and anyone who defends it is defending an ugly hack. The only reason it and double flats exist is because there are some key signatures (this happens with hungarian minor sometimes) where you end up needing to define 3 notes in the span of one space and one line on the staff, and you can't, so you have to borrow from an adjacent space or line. And so sometimes that C is actually a B. It's super annoying but uncommon enough that it's not worth everyone learning a new notation.

Anyway, don't let the nay sayers stop you from learning music however makes the most sense to you. Have fun