I cannot believe what some people are suggesting here. The 'othering' is simply appalling
I was shocked when these threads first started appearing. I'm not shocked any more because the ableism is so constant. I'm just depressed (and a bit scared) instead.
They have a duty of care to their staff. They can refuse admittance and they are entitled to do so
They can't refuse admittance by reason of disability. Which is what they're doing if they refuse entry to those who are exempt.
Most shops know this. All the larger companies do. They also know that they cannot ask for proof of exemption (just as well, since none exists).
Also, shop staff are are not required to wear masks unless they wish to. The vast majority don't. I rarely see people on threads like this taking aim at them, though - it's always customers who are disabled/those with health issues who are the 'problem'.
Actually a 'mask exempt' hour might be a good solution
There is already a solution - exemption.
It's not possible for those who are exempt to fit all their shopping into one hour at 9am on Wednesdays, for example. What if you run out of milk or paracetamol or need a top up shop? What if you have mobility issues and can't do all your shopping in one go because you can't carry it?
The difference between what you're proposing and the shopping hours for NHS staff/the vulnerable etc at the height of lockdown is that those groups were also free to use the shops at other times, too. You're suggesting that the exempt should only shop in that designated hour. Apart from anything else, imagine how packed it'd get (if you could get into the shop at all during your designated hour, given SD requirements/queues - you'd have to start queuing ages in advance to be sure you could get in which is unreasonable for many who are disabled/have health conditions, particularly with winter coming up). All those people without masks together in an enclosed space, as opposed to a handful. What could possibly go wrong?!
I don't know why people can't just accept that exemptions exist and get on with it. And why they can't keep their ableist, ignorant thoughts to themselves.