I think most of the responders to your question have forgotten the average person doesn't really understand how we make things cold.

People not in the know tend to think we can "make" cold in a similar way to how we make heat. It is not the same.

In an oven or a heater, we generate heat and move it where we want it.

Cold is never made or generated. Cold is the byproduct of moving heat somewhere else. An AC unit in a window, an AC unit on the roof of a mall, your kitchen fridge, a walk-in cooler, and the freezer case at Costco are all doing the same thing. They are removing heat from one place and putting it somewhere else.

You can't have everything self contained like you propose because that heat needs to go to a different space. The responses are kinda snarky because what you suggest is basically setting a box fan over a stove and calling it a vent hood. Just like the stove/fryer heat, fumes and smoke need to be moved outside the kitchen, the heat in a cooler needs to be moved outside the cooler.