You are correct, my student, but your analogy is imperfect. A man who sells food has unavoidably expended time, expense and energy in its production. Theoretically, this is balanced by the price paid by his clientele for its purchase.

[Genji can practically hear him settling into place, warming into his more teacherly disposition more and more with every word.]

What Hanzo proposes is not an equal trade. Both parties generate what is presumably an equal quantity of chroma by moonlacing already- why should one party be asked to pay a premium for the privilege? If an individual is starved for contact and cannot seek it through regular means for whatever reason, is there any reason why a willing party should not agree to aid them without requesting some of that chroma?