I sympathise with anyone who has a condition that precludes them from wearing a mask, I imagine there are accusatory stares from some. Sainsburys do put out loud recorded messages to that effect, pointing out that some people have conditions which exempts them from mask wearing to raise awareness of that.
I was all for masks when the lockdown started, I don't enjoy wearing mine, it's just something we have to live with for a while it seems. Like others, I have to wear glasses for print, sell by dates etc., so it's a constant whipping them off and on in supermarkets and the like otherwise they get so misted up.
I had to pick up something from our nearby John Lewis earlier this week, I thought I'd have a browse, something I haven't done for a while, after a short time, I decided I'd had enough, shopping isn't an enjoyable experience with the mask, quite hot and bothered after a while. We had to cancel a couple of flights this year, factoring in time at airport and then on plane with masks, I'm glad we did.