IKR?! Or, you send him to the store with a list of meal ingredients for the week – and him KNOWING we're out of certain staples – and he comes back without half the stuff you needed (including NONE of those staples you would NEVER leave the store without). But, there's plenty of stuff he arbitrarily chose instead.
Your entire meal plan for the week is blown. He didn't get anything you can put together for full meal without going back to the store to buy missing bits.
And of course, you cannot just go into a store for exactly the items you need. It's impossible get out of there for less than $50 – even if it's only a single grocery bag of purchases.