Yeah, absolutely get that, though in this instance in particular, a well written, apparently sensible post appears a reliable as the endless stream of conflicting drivel from the Government
I'll probably get it in the neck from some quarters for this, but I think the best defence against this (or any pandemic) is reasonably well-informed personal choice. Legislation is a blunt instrument which can never take account of individual circumstances, and tends to be trying to strike a balance between the specific agendas of the politicians proposing it, and the functional need for it. So, for example, I am a bit appalled by the people who take 1m-plus-and-masks as some kind of magical amulet that protects them from Covid-19, regardless of what else they are doing (the particular example I have in mind is that of counsellors who are interpreting government guidelines to suggest that they'll be perfectly safe sitting in a room with a sobbing, snotting, laughing, shouting client...or a succession of them, just so long as they've got that ruler out for the separation
).
On the other side of it...I live in a rural community which, until the tsunami of holidaymakers arrived a week or two ago, has had about 3 Covid-19 deaths in a 30 mile radius - we have been in a state of grace which has meant that the kind of precautions you're describing would not have been necessary. That has enabled people to be a lot more pragmatic about how they manage the risk, given that the odds of any given (local) individual being infected are extremely low. So people have tended to be less paranoid, and more willing to gather, with at least a significant nod towards social distancing...though masks have been a rarity, even now. That's changing with all the holidaymakers, and we are starting to see an uptick in the number of cases being treated in local hospitals, along with anecdotal stories of people wandering into GP surgeries they're not registered to and complaining of Covid-19 symptoms.
None of this is really adequately covered by legislation (Welsh or UK), and I think that those of us with enough of a handle on things just have to work out how we feel the best way to protect ourselves and our communities is...and those who want to simply stick by the law? Well, OK, they're probably putting themselves at more risk in some ways (you are not obliged to wear a mask in shops in Wales, for example), but at less in others...eg., if they're rigorously observing social distancing rules, and so on.
So, yeah - the best any of us can do in an individual situation is to look at the risk factors, figure out how to minimise them, and take our chances.