I think the difference is, that most rock stars started out in their garages and then worked and worked and worked for their stardom.
Pop stars are created. A little talent, good looks and a lot of wiggle and a lot of jiggle, spoon fed music and lyrics and a lot of promotion by the producer. Nothing requiring work by the pop star.
Exception might be Taylor Swift (only to an extent)
And Pop Stars are disposable, and if you want to get anywhere, you’d better toe the party line, of those who control the entertainment industry, which means you’d better shout at the top of your lungs, “Homosexuality is the greatest thing since sliced bread.”
There are thousands of Taylor Swifts out there.
Pop music sounds like it was turned out by machine and not human beings. It is a dead sound, it all sounds alike.