Kind of hard to understand what you're suggesting here so I can't really support or not support it.
So, I'm indifferent on the issue, however I can clarify what he means!
Currently if you use a hammer on a coconut, it breaks one coconut, meaning you've got to click 14 coconuts to get 28 halves. He's asking for an interface screen where you can click "Make 1, Make 5, Make 10, Make X" and only need to click the hammer on a coconut once to then type 14 in, and break all 14 coconuts in your inventory.
And his reasoning is, "Currently, it's too labor intensive to split coconuts to make coconut milk, no one will make their own potions except Ironmen."
The reasoning I don't support because it creates a demand for the potions on tradepost if people are too lazy to make them.