I'm a classically trained pianist, and I basically agree with you. I read sheet music because that's what there is. As a young composer, I wrote in standard notation because I hadn't questioned it. As an old composer, I don't think there's anything great about it, and I have no need of it. I 'write' all my music on hardware or software synths. It's much easier. All I care about are the parameters. What note, when, how long, how loud, etc.