The wrong visual is worse than no visual. The decision starts with the buyer question, not with what assets marketing already has.
Decision rule
If the buyer doubts whether the workflow is real, use an annotated screenshot. If they doubt how it fits the stack, use a diagram.
Closing
Working on something where this applies?
Tell us the surface (deck, landing page, product visual, sales kit) and the audience that needs to be moved. We reply with a scoped proposal.