There's no way anyone is keeping me from going home from work
Good luck with that. Emergency legal powers are now in place to prevent you from doing just that thanks to a guy in Arrowparke threatening to leave quarantine.
Given that 2003 outbreaks of SARS in Singapore, Canada, Vietnam and Hong Kong were all linked directly to medical staff being exposed and subsequently infected, its a wise precautious until more is known about the disease. It might turn out to be very mild, but until then, being overly cautious is sensible.
The point is that medical staff are high risk of being infected, and this also puts their family at higher risk of then being subsequently infected and then spreading the disease.
Its draconian, and I'm normally not a fan of such authoritarian measures, but in this case do believe its a proportionate response.