Love it...until they need an operation that's deemed as not an emergency or even critical. That knee replacement you "need" is really more of a want to them, so here's a pair of crutches for the next 8-12 months until they can see about getting you that knee.
By the time you get that knee replaced you need the other knee replaced which was previously fine, but you've been putting all that extra weight on it for the last year.
Oh and you've gained weight (fat) also because you couldn't work out as much or do cardio. Now the next year has gone by and you've got the second knee now and you've gained 100 lbs of fat. Now you're on meds for your high cholesterol, diabetes, high blood pressure and depression.
Everyone should be entitled to that.