Excuse my ignorance, but what is "the reason you can't solve NP-hard problems using soap bubbles"? That seems an obvious category error, but that can't be the r

Excuse my ignorance, but what is "the reason you can't solve NP-hard problems using soap bubbles"? That seems an obvious category error, but that can't be the reason you're dismissing the feasibility of quantum computing. What am I missing?