Although I think it is being blown out of all proportion, I would self isolate IF I KNEW I HAD IT.
Unless you are a hermit you are going to interact with people and your family and friends.
What if as an indirect consequence you had shut an entire school down or worse, infected a care home and residents were to die ?
Ignorance is bliss as they say, you may not even know it was as a result of your descision. But I would want a clear conscience.
So many on here boast of earnings, their flashy holidays, vans they drive etc. etc. . As frustrating as it would be to take 2 weeks off, it wouldn't be the end of the world. Most could afford to and its not lost money, just money not earnt yet. What about these emergency funds people harp on about ? Isn't that what they are for ?