Having confidence in something, and finding out that your target audience doesn't want it, or need it are 2 entirely different things.
Per his OP, the technical founder has not explicitly stated whether he believes that the product has zero utility. Rather he's saying that he found out (from data I suppose) that there is no product market fit for it.
Per his OP, the technical founder has not explicitly stated whether he believes that the product has zero utility. Rather he's saying that he found out (from data I suppose) that there is no product market fit for it.