I'm wondering why pot filler faucets all are spec'd for Cold Water Only. I would like to run mixed water through one of these. I would add a mixer and forget about the single valve on the pot filler.

Obviously I could contact all the manufacturers and ask them about running various temperatures through the potfiller, but...

I'm hoping someone can shed some light on this question beforehand.
What if anything could make it a bad idea for mixed water to be run through a spout sold as "For Cold Water Only".
Mixed water might be quite hot at times, so a limit stop could be added too.

The purpose of this effort is to have my very own remote-mixer wall-mount kitchen faucet.