

No, it’s just a matter of who they accept as legitimate “authority”.
If the Dumbass-in-Chief, their ministers, and their news had all told them to wear masks, they absolutely would have, but every single one of their primary authority sources were pulling in different directions and they don’t accept any “liberal” sources as legitimate authority. You can see it at a much smaller scale by looking at Church congregation sizes where some ministries focused on trying to protect their elderly and infirm members and those who didn’t.
Conservatives who had pastors who told them to wear masks were a LOT more likely to do so than ones who were getting mixed messaging.
Because it allows for proper prioritization of needs, allows for the better exploitation of our surroundings (as tool using animals), and is INCREDIBLY useful for helping us try to “model” other human’s behaviors and act as social animals as opposed to just being the regular kind.
Probably the most impact “Why” question probably started occurring before we were even human and it was “Why did they do that?”
Being able to understand the motivations of other beings is absolutely fucking incredibly overpowered both in terms of cooperative action with your fellows AND destructive action against foes/food sources.