Fast food junkies go native

I was very glad to see the Hunza region landscapes and peoples in this video but I found the music very annoying, out of touch with the location.
Also the 4 British subjects who are trying to lose their addiction don’t seem to be very thoughtful, except perhaps for the young father, so all the effort that went to make this event happen seems to be lost on them.
I think one month is too short for real change to occur when people are very deeply attached to a bad habit. But perhaps it was long enough for the kind Hunza family which accepted to do the experiment for them.