[cinntaile]

Your analogy is different from the situation we're presented with here. The question I answered is why converting to kcal is nonsensical. Yes it's just a different unit but... Kcal is nowadays used for things you eat (and exercise because it makes sense to use the same unit), it doesn't really make sense to convert radioactive material to that unit.

[sebzim4500]

Converting from MeV to kcal is not nonsensical, both are units of energy. They are just conventionally used in different contexts.

For example, it is not 'nonsensical' to ask for the distance to the nearest shop in angstroms, but it would be unusual.