I don't really get why it's become such a lightning rod either. Like most things these days it's become political which means all logic is tossed and a person is required to be one extreme or the other...masks are an absolute necessity and everyone must adhere or they are evil OR masks themselves are evil.
Some people reject them because of pride and being told what to do. Some people think it's a conspiracy to groom the public for control. Some people reject them because they genuinely believe it's pointless. For some it's not wanting to stand out as the weird paranoid person. In some cases it's just a matter of taking a personal risk because it's impractical or unenjoyable to try to wear a mask doing that particular activity. Other cases it might be because one aspect of the activity effectively undoes the whatever safety was gained by using a mask at other points in the activity.
Some people reject them because of pride and being told what to do. Some people think it's a conspiracy to groom the public for control. Some people reject them because they genuinely believe it's pointless. For some it's not wanting to stand out as the weird paranoid person. In some cases it's just a matter of taking a personal risk because it's impractical or unenjoyable to try to wear a mask doing that particular activity. Other cases it might be because one aspect of the activity effectively undoes the whatever safety was gained by using a mask at other points in the activity.