I never have and never will understand the compulsion some people have to keep the health insurance companies in business. The dynamics of private insurance (see "Adverse Selection") are such that insurance benefit-holders are already paying for the ill-health of others. A public single-payer model will do little to change this. Meanwhile, private insurers continue to engage in exceedingly immoral methods of evading their responsibility to their clients, as is dramatically illustrated in this case.
I'm unimpressed with the arguments made in favor of the status quo. Perhaps it's because I never really bought into the libertarian tripe about how we are all rational actors working with the best information available to us. I also never bought into the right-wing conservative myth of benevolent industry.