I've compared album
RED with
a story or a book. I'm intending to compare album
1989 with
a song:
THIS LOVE is obviously the BRIDGE of the song 1989, which I love very much

SHAKE IT OFF as one of the CHORUSES
What else?
Edit: Sorry for bringing up this, because I was/am repeatedly listening to BAD BLOOD which reminds me of the structure of 1989. And if this strange theory can stand, then it explained why there is NOT a title track on 1989, because the whole album is a song.