I think op that there are many people who are struggling now. They could all, I'm sure, find reasons why the new rules don't apply to them and could argue that them just doing X isn't that a big of a deal, which, if it's just them doing it then it probably isn't a big deal. The problems occur when everyone starts doing X, and why shouldn't they?
People on MN have been arguing that they don't have to abide by anything apart from the law. Which therefore means that anyone who chooses to can drive around the country, can visit wherever they like, can go out as many times a day as they like for as long as they like. Shall we all do it then?
I'm desperate to see my children who live 70 miles away and I know that my parents are too so apparently nothing in law stopping us all from driving down there and waving at each other in the city centre is there, as long as we maintain social distancing? Of course, we live in London which is the epicentre in the UK and no doubt will go into a shop or at least toilets while we are down there, possibly passing it on if we have it, but it's not against the law right, so it's fine according to some on MN.
By the way we won't be doing it - I'm shielding and we know that we have a collective responsibility to do the right thing, even if apparently the law doesn't reflect that.