Part of the reason why Lindsey Stirling hasn't been criticized for still being single is that she is more of a under-the-radar musician when compared to Taylor Swift. But I would never criticize someone famous for still being single or even dying single. When you're that famous, a lot of people will be attracted you for the wrong reasons, and it can be very hard to know who those people are until you really get to know them. The new age singer Enya is in her sixties and is still single, and nobody gives her a hard time about that.
I agree with you when you say Lindsey Stirling is a better musician than Taylor Swift. Lindsey Stirling is probably the only violinist on Earth to play the violin while running at full speed, jumping, twirling, and even being held upside down. She also makes her own costumes and edits her own music videos. As far as Taylor Swift goes, I know she's famous, I know she's now a billionaire, but what I don't know is what sets her apart from all the other singers out there. I also don't see how her relationship with Travis Kelce will work out, mainly because I am concerned that they will not have enough time to spend with each other.