I'm not arguing she is the "goat", nor do I think anyone else is in here, it seems like it's a bit of a strawman. I think there's a Grand Canyon between arguing she's the goat and saying she has no talent, has no memorable songs, will have no legacy, etc.
Her fame, her career, her body of work until now is being massively minimized.
Also, from a pure quantifiable perspective, a song everyone would agree is quite relevant in the 21st century, Seven Nation Army, has 1.5bn listens on Spotify. Swift's highest ranking song on there is Blank Space with 1.6bn - despite being released 11 years later, but with Spotify gaining popularity later than the White Stripes songs, I guess it kinda levels the playing field. She's massively relevant. Maybe not on here, maybe not with the overarching demographic of the Caf (and yes, that is genuinely a point to take into consideration), but the world is quite a bit bigger.