“I would sell my soul to the Devil if I could blank”, if you don’t believe in the Devil isn’t it a nonsensical statement to make?

I have heard people in the past say they would sell their soul to the Devil to get with a person they are burning in lust for, or for some success endeavor wise, etc. If one doesn’t believe in the Devil (which would be kind of hard to do and believe in evolution too), would it not be a nonsensical statement to make? Why not say ”I would sell my soul to Alice in Wonder land if I can X”, or “I would sell my soul to the Man in the Moon if I could get X”, etc.? It would be just a plausible or make as much sense as selling your soul (if you even believe you had one, if you had one it has to go somewhere once you die, but that is another story) to a Devil that doesn’t exist. If one just says it because it is a phrase that has been around, why blindly says something that is untrue and has no chance of being remotely plausible?