There's a difference between not following the food pyramid and not getting vaccinated. It comes down to health of the public vs health of the individual. Someone's decision to intermittent fast doesn't affect anyone other than the individual. The decision not to vaccinate can affect many, many other people.
But, that's not a valid argument anymore since the vaccine is freely available and not so effective at stopping the spread. Anyway, people live in such different circumstances- some people may live in near isolation already, it's a jump to judgement to condemn someone without taking into account their situation. The largest spreaders are probably people with the most social connections, many of which are vaccinated- you could demonize people for all sorts of life choices that led to viral spread.
