There is clearly a debate regarding whether the NHS should pick up the tab for treating clinically blooming huge people since some may consider getting up to that size a personal choice.
The following is not specifically aimed at you, more at the general argument..
On that basis, should the NHS pick up the tab for stitching you up after a drunken fall or brawl on a saturday night? after all it was your choice to get drunk...
should they foot the bill for the oxygen tanks for smokers who end up with chronic lung problems?
pay for the transplant team for heavy drinkers getting a new liver?
the pins and rods needed to put a bikers leg back together after a crash?..... and so on... even right down to should they pay for the nurses and midwives for your wife when she drops pregnant.. it was your choice....
about the only things that the NHS should be paying for under those "rules", are injuries and illnesses caused by "acts of God".. if a tree fell on you in high wind maybe.. but then you could argue that it was your choice to be walking past it in the first place..
I pay my taxes and NI just like everyone else so why should the sickly and infirm, the smokers and the boozers get all the help and not me just because I don't / didn't eat the right things.. ( and that's sometimes not a choice, it's necessity if chips and mass produced prcessed foods are cheaper than fresh fruit and veg
.. )
Food is a necessity unlike smoking and drinking but there's plenty of free help for them available... ( and I suppose here comes the "well we pay extra tax on those..." arguments..

)
anyway.. rant over.. and again not aimed at anyone in particular, just the "well he got himself fat, why should we pay to help him" mentallity..