Print on demand is how a small desk ships 180 designs without a warehouse of wrong sizes. It is also how a lot of satire merch looks like a temporary tattoo on a bedsheet.
We care about the mockup matching the color you pick, the cotton, and the type. If the first photo lies, the joke is already weak. That is a shop problem, not a print-partner slogan.
Later draft: what POD can and cannot do, defect handling, and why we say it in the footer.