Maybe someone here can answer this. Do founders of important technologies generally have a good idea of the primary use case(s) for their product? Seems silly t

Maybe someone here can answer this. Do founders of important technologies generally have a good idea of the primary use case(s) for their product? Seems silly to ask, but I posed this very question to Meta, and their answer was essentially that they are going to "let their users decide that." Three use cases were listed off, but I didn't find them particularly impressive. What should be made of this? I ask because it seems contrary to the importance of solving a problem. With SpaceGlasses, the users run around deciding how the product can enrich their lives. Seems pretty odd. I've found that with lots of successful tech products, I've been able to pretty quickly see the how I could use it in my everyday life. The iPhone is the classic example, but even search, email, Facebook. I don't really see that here. I'm pretty young though, so my experience is really limited. Also, I realize my personal experience doesn't make for a very strong argument. Still, it's a pretty terrible pitch.