I think it's a pretty rare parent who wouldn't knowingly bring their sick kid to daycare. Once their child is sick the worst thing has happened. They really can't loose by doping and dropping. With Advil they get a six hour window of protection which gets the kid to nap. If they spike a fever it's during nap. The worst case scenario is that they will miss work tomorrow if tomorrow isn't Saturday. Better to miss a day you know is coming then one you don't.

Most parents would rather be at work making money than being home caring for a sick kid. They would much rather you care for the kid sick then them doing it. Work is usually easier than being home with a sick kid.

The only real risk is getting booted out of daycare for it but that risk is low.