I can certainly understand this position:
Not one of them, of course, is actually capable of doing anything more than looking up a part number. (Or worse, asking someone for a part number in an automotive forum.)
You will never see this sign, though, in a body shop. The customers there want genuine OEM parts because, as one once said, “It affects the resale value of my car.” Not as much as running into stuff, I assure you.