I dont think it's entirely fair to just say tough shit. I would abide by a quarantine, even if it meant staying at work, but I have support around me. I dont think its unreasonable to ask what would happen to children and other dependants in a quarantine scenario.
I can answer part of it from personal experience. Unrelated others, teachers, nursery nurses, neighbours, etc will stand up, some asked, some paid, others not.
I know this is the case as I was one of them, during the SARS outbreak! I know what was put in placed for us, including the chaildcare for those with kids and no support - like the couple who were quarantined, one of whom had SARS, and their kids were taken in by neighbours with another school teacher helping get them to school and back. They spoke to them every day and whilst the kids were frightened, they didn't lose contact.
I spoke to DH every day, a neighbour I didn't even know fed my chickens, even watered my plants (DH was working away at the time).
Enough people are kind enough to put themselves out...