And had you had that issue in America, as a working class person,  your pre-existing condition would have kept your premiums for insurance too high to afford, assuming your parents had insurance at all and were able to get it diagnosed before becoming too bad to treat.  Either way, your grandmother would still be dead today and you'd either be dead or homeless from medical bills. 

Here's the human cost of not having socialized healthcare:  http://news.harvard.edu/gazette/story/2009/09/new-study-finds-45000-deaths-annually-linked-to-lack-of-health-coverage/

But, yes, I'm sure your anecdote about a misdiagnosis (something that happens in America all the time) entirely trumps the unimaginable human suffering we have actual numbers to back up. It also over rides the fear and pain of  people who are, right now, in fear for their lives due to healthcare reform. 

As you grew up British, allow me to summarize in your native tongue: Piss off, you rancid cunt.