TikTok's whole economy runs on the 15-second hook, so songwriters are being trained to write for the clip, not the song. When the goal is a loopable snippet that stops a thumb, you get repetitive choruses, no bridge, no story, no build. The art of songwriting is about tension and release over three minutes, not a catchphrase that fits a dance challenge. That's not evolution, it's erosion. And yeah, some great songs still break through, but the incentive structure is reshaping what gets written in the first place. That's the damage.