My main question is: For how long?
First, presume COVID will never be completely eliminated. (Certainly it will never cease to be detected by widespread RT-PCR testing with a 1-2% FP rate).
If you won’t grant me that, presume that equally deadly (to certain demographics) diseases will always exist.
Do we never get to go around outside without a mask on again?
Some cultures think that’s the right choice. Some do not. There are valid arguments on both sides, so I think it’s not appropriate to belittle either perspective.
Being required by law to wear a mask whenever you are out in public (and not eating?) is a major cultural shift. It’s reasonable that people will have different readiness to enact, e.g. a Federal law with major financial or criminal penalties involved.
My ancillary point would be that COVID is not the same level of risk in all places and at all times. So, e.g. a Federal mask policy with a $1,000 fine that applies in FL and MA all the same, where MA cases are basically at the noise floor of the test right now, is not justifiable. Or, likewise, a single policy which applies to nursery schools and nursing homes.
Particularly for large heterogenous countries, there is a huge benefit to local and regional government being able to set appropriately strict policies for their own jurisdictions.
There is also absolutely the need to be dynamic in your level of response. Look at Melbourne for example. You can’t lock down as hard as they will be doing indefinitely. Perhaps you can do it for a short time in response to an acute event. That’s just an extreme example in the overall scale of phased response protocols. Legally mandated masking is just somewhere further down that spectrum.