[Dr. Sivana]

Julie Andrews never wrote a song.
The topic is songwriters not singers.

I know, but I don't know if anyone even covers Swift's songs. My point was, that if someone performs a song, including a non-writer like Elvis or Sinatra, and people like the songs, whoever wrote it wrote a good song, even if the song was written for a professional singer like Andrews, and not for a Church congregation, or the patrons at a London pub.

[SomeCallMeTim]

I don't know if anyone even covers Swift's songs.

SecondHandSongs (a comprehensive database of cover versions) lists Taylor Swift with 226 originals. Many of these—especially her hits—have dozens of documented covers.

Her top-covered tracks include:
"Shake It Off" (~89 artists)
"Blank Space" (~79)
"I Knew You Were Trouble" (~60)
"We Are Never Ever Getting Back Together" (~58)
"Love Story" (~56)
And others like "Style," "Bad Blood," "You Belong with Me," etc., with 40–50+ each.
mostlymusiccovers.com