Actually the man has put himself up for discussion by agreeing to take part in a television program and have an article done on him..
Yes until the program is aired, we know little about this man so assumption is all we can go on...
So first why is this man 58 stone around 40 stone overweight far beyond the normal range of reason even for most health issues such as lack of mobility, under active thyroids, steroids and other medication that know to increase an individuals side
So you look at the brain to consider if anything wrong there, a missing switch/receiver, depression or perhaps another medical condition that effects the brain all these come under 'mental health'
But we shall find out more in the program..
As to discussing benefits
Well care isn't cheap and you won't find many care packages at that level 18 carers per day is far from the norm..
As I said having dealt with care package I have some idea of cost involved, it may be ten years behind the times but one thing for sure the cost of care provision hasn't gone down at all... with dealing with these package and not one of the packages I built/manages involved such a level of care provision there weren't many that didn't get government help on cost, and the several that didn't get help, wouldn't have been able to sustain the cost of their care package for many years...
So no I don't think anybody is treading on dangerous grounds really..