Hmm, no. A lot of people listening to a song does not equate to you having heard it. It’s true that makes it more likely that you’d have heard it yourself, but being more likely doesn’t justify speaking in absolutes, as you’re doing.
What I was saying is that something being trendy isn’t necessarily relevant whatsoever to whether something is new to you. You can say it’s more likely you’d also have experienced it, but that’s it. It doesn’t change whether or not you have.
“Wow, I’ve never heard this type of music, this is really broadening my horizons”
“Uh, NO it isn’t expanding your experience, as that music is extremely popular” - Complete Absurdity. It sounds so collectivist, what the group is doing dicates your own feelings and experiences? Nope.