As I see it, there are three reasons for people to follow the guidance. The first is to minimise the risk of you getting the corona virus. The second is to minimise the risk to those who live in the same house as you, by you giving them the virus. The third and perhaps more important is to minimise the demand on the NHS so that others who do get seriously ill because they have to expose themselves to the risk of getting the virus, do not find themselves able to get the level of help they need because you are already occupying the resource, be it bed, ventilator or just nursing time.
After all who is the more deserving, the doctor who has fallen ill whilst treating patients or the person who caught the virus by unnecessarily exposing themselves to the virus?
And yes I know it is a loaded question but it is not just your life at risk.
And to answer the inevitable question, no doubt I will not be strictly keeping to the guidance.