With red and green wire giving a full stack is an easy way to give plenty without a need for any handlers. It's highly unlikely that you would need 200 of the same color of wire in a row, so 200 is pretty much as good as infinite for all practical purposes. And it disappears when you put it down, so what does it matter how much it gives, it's ephemeral anyway.
Regarding the copper wire, it's a dangerous line. If you look in other topics, some people think even how it is now is cheat-y. Refilling the cursor as you suggest would only make the issue worse. The one free copper wire is meant strictly as an unlikely convenience so that you don't have to trek across the base if you need just one piece suddenly, because come on, how often does it happen that you need copper wire for wiring specifically. If you need a lot of copper wire, you should just go get a lot of copper wire through the usual channels. Copper wire is not meant to be free unlike the colored wire. It's a proper ingredient.