Oh, she's massive no doubt about it. But the fact is that as of right now her ticket prices are absolutely massive too, so the idea that she really cares deeply about her fans makes me slightly cynical. As soon as you start wedging business practice arguments into it the whole "I love my fans, I do" thing just falls apart. And, yes, I include every artist in that sentiment.
And she IS only top of the "biggest tour in history" chart because of the ticket prices right now. Her 2023 portion of Eras (which is the tour these PR folk are talking about when they make that statement) made more revenue than Elton John's farewell tour in the same period, despite selling 2 million tickets less. Hell, Coldplay's current tour has sold 3.5 million more tickets than Taylor's published numbers. It's clever marketing that adds to the hype but, then again, Taylor's a better businesswoman than she is an artist so fair fecks to her.