You just precisely stated the argument used to tax candy, soda etc while not taxing groceries. Thank you.
How did I do that? I suggest you re-read what I said.
I explicitly state that having different tax rates on different items is a Bad ThingTM... that, to take this example, that all groceries -- whether or not it's fruit, meat, eggs, candy, chips, soda, whatever -- should be taxed at exactly the same rate. It is up to the individual, not the state, to determine what is a necessity for themselves.