I guess that the situation he moved himself into as he wasn't local to his family was the same as what I have now. If any of us got sick and thought we may not be able to look after the children we would all have to have made other arrangements for them one way or another.
Unless you are a very well connected and highly paid government advisor, you aren't in the same position as Dominic Cummings.
Even assuming that he has no friends or family closer than Durham, his family, who didn't have symptoms, could have travelled to see him and them placed themselves under quarantine. There was no need for him to make a 250 mile journey to Durham.
The advice was not 'Stay at home for 7-14 days if you or anyone in your household has symptoms, unless you have children in which case you should move to another household as a precautionary measure'. The advice was 'Stay at home'.
That's obvious without needing specific guidance I would have thought.
Fathers have missed births, funerals have been unattended, at least one child has died alone in hospital, confused elderly parents aren't being visited.
Most of us aren't doing the things that we would usually do because we have been told that to protect the NHS and save lives we need to obey the rules.