I think this partly has to do with the typical "bubble" effects of social media, even us Lemmings who opt for a social platform that tries not to create such bubbles or engagement algorithms, the mere fact we use this platform creates a bubble.
I don't mean to generalise, but 9/10 Swifties in a crowd probably use mainstream social media, 7/10 have an iPhone, 8/10 will be posting on Instagram nearly every day.
Almost none of them will be going home to post about it on Lemmy, or Mastodon. Therefore, as us fediverse users tend not to use mainstream social media, we simply don't occupy the same cyberspace as Swifties.
Instead, we occupy the cyberspace that usually attracts opposers to mass-media, or really anything mainstream. Swifties are effectively our opposites, and thus friction is quite inevitable.
You get anomalies of course, ร la me, but, like any anomaly, it's rare.