I think that many people just not get the firm (albeit) statistical risk between contacts, hospitalisations and, ultimately, deaths.
Sending one’s child unnecessarily to school is similar to drunken driving if a bit over the limit. Most of the time, you will be fine. You might have made your own ‘risk assessment’: ‘I handle my alcohol well’, ‘I am not going far’, ‘I will drive slowly’, ‘the roads are very quiet now’ etc etc. However, every driver over the limit on the road statistically increases the risk of driving deaths and hospitalisations for others.
Strangely, there is little sympathy for drunken driving on here, regardless of the excuse, whether the journey is absolutely necessary for work or education.
Extra contact which is not absolutely necessary is just the same. Your child may not get sick, they may not knowingly infect anyone else but, for every extra contact there is a small chance of extra infection abs each infection has a statistical chance of leading to a hospitalisation.
You have to really weigh carefully whether that extra risk is balanced by the good done to society of doing your job in peace, from home. People are remarkably confident that their jobs are vitally important, but I think there is a little arrogance in some of the posts on here (similar to some drunken drivers in important jobs). If we managed the first lockdown with far fewer pupils in schools, we need to replicate at least that for the next few weeks or many many unnecessary deaths will inevitably occur.