It does seem really stupid though. Are you going to go to a fish-and-chips shop, ask for "chips but no fish", get told that they're not allowed to sell that, and then say "OK, we'll go to McDonald's instead"? That's never going to happen!
"Yes but I don't want to assault anyone."
"Ok. We are cooking special, non-salted fish for that purpose."
It does seem really stupid though. Are you going to go to a fish-and-chips shop, ask for "chips but no fish", get told that they're not allowed to sell that, and then say "OK, we'll go to McDonald's instead"? That's never going to happen!