Why was it verboten to called BuckVie Fleetwood Mac?

[TimeCastASpell]

Honestly if they had called it FM, they would've had to sing all of their same old same old instead of the focus there was on the new material. And I was darn grateful for the new material (even as one of the Stevie leaning FM fans). At this point calling a tour FM means nothing new or nothing even a bit different, same old songs.

Hope that didn't come off as snarky as it maybe sounded. I know that's a huge complaint most of us share. So I'm sort of joking but sort of serious- calling it FM would've made them have to stick to the old stuff (for whatever reason but that's obviously a pattern).