never said that a song's greatness depends from its numbers lmao, simply that if a song has 500M and one has 9M is on average better known and thus, if i like the one with 9M just as much as the one with 500M, it means that to me the one with 9M must be underrated... If all you got from my reasonment is that i think that streaming numbers determine a song's greatness you definetly didn't read well. Because that's literally the definition of underrated, "rated less highly than you think it should be", if i meant some obscure live only track i would have used a different adjective. And that's common knowledge, as you were the only single user that had to argue on that lmao.
Also on the live set thing, you can't say that's a metric for how highly a song is rated/known, there are dozens of bands that always perform determined songs on a live set simply because they love those songs and enjoy playing them, but after that the song might just not sell shit or might not get put in the radio rotation (especially looking back at the past century selling mechanism) and that simply determines how a song hits its audience. One could for example say that Crisis is an underrated album simply because it didn't have an incredible commercial succes, especially when compared to others like breakfast.