You're assuming that the people who are throwing tantrums on planes are premeditating enough to prepare by bringing weapons. Yet if they had those kind of planning faculties, they would realize that flipping out at flight attendants doesn't further their cause at all.
Alternative take: the people throwing tantrums have reached their breaking point from the stress of being in a totalitarian environment [0]. And all the security theater of airports is a major and needless contributor to that stress.
[0] Just to be clear here, I think masks are highly necessary and if I had to fly somewhere I would be wearing a full face P100. But the act of forcing people to wear them is still totalitarian, regardless of how justified it is.