"Other than being talked about a lot, and having very dedicated fans, do you think you could name 2 or 3 ways she's a "MAJOR cultural force"?"
Jesus wept, really?
Since you're apparently such an expert on modern culture, please give your learned opinion on how the others in that list DO qualify and Swift apparently doesn't.
And, since we're picking arbitrary numbers, please give 3.7927 reasons.
OK, in simple terms...
You cannot gain the kind of continuous, multi-year media attention that Swift has garnered and not be a cultural force. Multi-media both reports on and helps define culture. A few weeks or months media attention is a flash in the pan. A decade plus? Major force factor.
Swift's battles with her previous label over ownership of her music masters has had a significant impact not just on the music industry but the entertainment industry in general and a growing impact on creative rights in all media.
And (unfortunately) she's also had a political impact on the broader culture. Whenever she's touted voter registration, registrations, especially among women, have surged. Political scientists have said she's behind only LeBron James in the overall effect she's had on American politics in the last decade, and based on surveying, she's been credited with helping swing several elections (unfortunately not in right direction).