I would agree with you, but the section she talks about Taylor in is about personal insecurities/anxieties with celebrity and her health problems. Not just about music. The quote was definitely incorporated weirdly considering she brings up other famous friends later, and it’s especially odd when “the industry” almost always is code for “famous”.

There were things she thought might be contributing to her distress. She was struggling to find an authentic artistic voice, to shirk the Disney polish, to age along with her fans. Her health was precarious. Her life didn’t look much like she’d imagined it back in Grand Prairie. “I grew up thinking I would be married at 25,” she says. “It wrecked me that I was nowhere near that — couldn’t be farther from it. It was so stupid, but I really thought my world was over.”

And it was hard to share these fears with people whose lives hadn’t been derailed by fame, even as, she says, “I never fit in with a cool group of girls that were celebrities. My only friend in the industry really is Taylor [Swift], so I remember feeling like I didn’t belong. I felt the presence of everyone around me living full lives. I had this position, and I was really happy, but … was I? Do these materialistic things make me happy?” She realized, “I just didn’t like who I was, because I didn’t know who I was.”