In fact, beaming makes the difference between 3/4 and 6/8 clear. But even if it didn't, you can't divorce the cultural object from it's notation. Once you're trained, traditional music notation is pretty optimal for reading music for performance, and you have to remember that that is the purpose of music notation. All alternative notation systems I've seen fail this simple test: once I've learned this, would I be able to play music I've never seen before reasonably well the first time? I've never seen anything that works as well as traditional music notation for that.

Meanwhile, music theorists are "obsessed" with notation only insofar as the music they study is written using that notation. You seem to have skipped my previous comments -- music theory, even at this basic level, has little to do with notation. You read it as notation obsessed only because you're not thoroughly enough steeped in the notation. Reading and writing music notation is as natural to a musician as writing in English is to you. It would be strange and counterproductive to insist on using nontraditional notation when every musician who plays the repertoire you're studying already reads the standard notation, and all the repertoire you're studying is written in it.