I agree.
That said, you don't often see the actual argument that "Something is good because it is popular," on the internet (other than the troll-ish, "Scoreboard" argument that you'll see when people are arguing about their favorite para-social relationships, whether it's MCU v. DCEU, or Star Trek v. Star Wars, or, um, stuff that we see here ....).
Instead, we often see people misunderstanding and incorrectly dismissing the issue of popularity. In other words, "Oh, who cares about that? That's just ... popular." Well, yeah. But understanding why something is popular is often an interesting task- after all, what are the factors that go into making something that is broadly appealing? I mean, that's interesting to me.
To quote Uncle Joe, Quantity has a quality all its own.