That's because in the 60s and 70s artists were much more likely to write their own music and develop their own sound. Today artists are mostly just performers w

That's because in the 60s and 70s artists were much more likely to write their own music and develop their own sound. Today artists are mostly just performers who record labels hired because they were pretty and can be autotuned to sound okay and their songs are the product of committees that buy and then assemble a few hooks written by hitmakers and Swedish people before handing those hooks off to producers to finish, while the performer might get provide some token input or come up with a few lyrics as long as they work around the mentions of whatever products corporations paid the record label to include in the song (https://www.wired.com/2008/09/products-placed/ https://www.wired.com/2008/09/products-placed/). That's obviously not always the case, but it's often not too far off. I'd recommend reading "The Song Machine: Inside the Hit Factory" for some ugly details It doesn't mean that that kind of music isn't any good, but it's often entirely commercial from the very start which makes it hard for artists who had little if anything to do with the creation of those songs to care about "selling out".