Multitasking (or multipasking as it is known to Finnish speaking people) is not bullshit, but trying to focus on several things at once and fucking up each one of them.
Calling people out for lying about spacing out during boring and mostly meaningless meetings is kinda a dickish move. Worker solidarity and all.
It makes sense to do it if you're management, I guess, but even then... Help each other out. Middle management has more in common with the lower level workers than they do with upper management.