you are 100% wrong about that. it absolutely does make you a better musician, and concepts of music that were previously unknown or difficult to learn will become much easier to understand.
also, i 100% resent your categorization of those of us who are pro-reading and anti-tab as "snobbery." only in america is educating yourself considered snobbery. learning how to read music doesn't cost anything except your time, so when someone calls it snobbery to learn how to read, i call it laziness to not learn how to read. obviously neither of us are 100% accurate, but if you're going to call me a snob, i'm going to call you lazy.
and stop with the rock stars who can't read as proof you don't need it, people. may i please remind you that you are not paul mccartney? and the likelihood of you having a career in music that good is less than the likelihood of you hitting lotto and getting hit by lightning in the same day, whether you read music or not.
only people who don't know how to read music argue against it. and if you can't read music, you really have zero clue what it offers.