@Cassie -- I respect your opinion but disagree. My thinking is more along the lines of
@Kmp2. There is no perfect solution, and particularly in these times, there is no decision that guarantees your family will be safe. So IMO you should weigh the risks of leaving the kids on their own against the risks to the family of someone passing along Coronavirus and the potential damage that could cause. And that decision is, by definition, highly individual. For ex, in my situation, my county is currently a hotspot, and I have asthma, so there is no way on God's green earth I am bringing a stranger into my house right now; in addition, my kids (when they were those ages) were pretty responsible, had experience managing themselves on their own, and we have people in the neighborhood available if needed. So on balance, the better option for us would have been to leave the kids at home. OTOH, if I lived in an area that was currently lower-risk, if my kids weren't responsible, if we lived all by ourselves away from everyone, if we didn't have health problems in the family, or any number of other things, I'd make a different choice.
The only thing I object to is the concept that there is one right answer for everyone and every situation. Would I ever forgive myself if I left my kids alone and one of them was seriously injured or even killed? Of course not. But would I ever forgive myself if I hired a babysitter and my kids or DH got very sick and needed to be hospitalized or died? Nope. Screwed then, too. Or maybe I quit the job, and we end up losing the house and having to move, and I'm unemployed for months or years because we go into a huge Depression -- if that happens, then in retrospect, those risks I avoided will look really small, and I'll still be kicking myself for making the wrong call and screwing over my family's financial future. Once again: I'm screwed.
There is no such thing as "safe"; avoiding one risk inevitably brings on another. So I figure all I can do is make the best decision I can, based on as objective as possible an analysis of the facts available to me at the time. And then cross my fingers and hope it was the right one and the bad stuff doesn't happen.
(Note that this is probably also why I deal with anxiety and depression on a pretty regular basis: I am highly aware that there is nothing I can do to ensure that my family is always safe, because bad shit can happen to anyone at any time, despite our best efforts. I am equally aware that if I follow my inclinations to control everything in order to ensure their safety as best as I can, I will very likely do them long-term psychological harm and stunt their growth in necessary ways. So I'm screwed either way. And there is nothing more stressful than being responsible for something you cannot control, particularly when that "something" is the single-most important thing in your life.)