up untill now I'd agree with you but the sheer rate at which covid restrictions are being lifted around the world means that they are swimming against the tide now. mandatory isolation is something we have all largely accepted without much controversy (unlike most other rules) but just like a lot of other rules, it is one that is impossible to police or enforce except for token spot checks. plus you could always just not bother to test
I'd even say, as part of the "de-risking " of covid, we need to move away from the idea that all covid cases must be avoided as far as possible, some obviously will be depending on the individual, but for the healthy majority catching this virus will just be a fact of life