If they did that, then people would
really argue that it's going against their freedom, and they would wear masks
less. Americans are contrary by nature, if you try to force them to do something they're going to not do it just because they don't like being told what to do. It's like what America was built on, to a certain extent. That's part of why everyone's so upset about the
forced shutdowns to begin with. American culture greatly values personal freedom, it's just the way it is, so when people are told that they
can't go somewhere without wearing a mask, or that they
have to stay home, they don't react well to it.
I would also point out once again that masks aren't low risk for everyone. People with claustrophobia, people on the spectrum, and people with asthma all find far more difficulties in wearing masks (and I'm sure there are others with conditions I don't know about who fall under this umbrella as well).
(Not a reply to you specifically but a complaint in general: what are these people supposed to do? Stay inside and never leave their houses until masks aren't needed anymore and Covid is gone? Yeah, that's not violating freedom at all.
)