First, they are afraid and looking for safety. Second, they believe masks work and provide some of this safety. Simple as that. They will not discuss the efficacy of masks at all. Anything questioning masks is met with something like "masks work the science is settled." I can't think of a single discussion I've seen with a normie that was even open to a discussion of flaws with masks. You'd get farther convincing them of Qanon stuff.