Mmm yeah, but dragging some hapless fattie down to the racecourse or cattle market would be a bit undignified. Admittedly if you're so fat you need six very large people to lift you - don't forget that we're talking about someone who weighs as much as half a Nissan Micra - then you've probably surrendered a certain amount of dignity anyway. At least keeping them in the back of the ambulance would be nicely anonymous.