People aren't omniscient. People at best look for known unknowns, but not unknown unknowns. Particularly when it comes to tech, that covers a very broad area of things that they don't know are possible.
The idea that if you need to tell people about it for them to know about it and potentially buy it, then the offer is a scam, is baffling to me.
As for inbound leads, their existence doesn't stop outbound sales being productive. they're not mutually exclusive at all. In fact they're complimentary. Outbound sales results in customers, having customers creates awareness of product in the market, people that hear about it through those customers become inbound leads.
Regarding people living fine without the new product. You're just arguing against progress there. Which as a definite luddite and potential anarcho-primitivist, I am all for. But "scam" isn't a synonym for just "bad", and any definition that includes just creating needs would have to include most of modern commerce. Definitely including any and all software developers.
