It's the Gell-Mann Amnesia effect at full force. Meanwhile many comments in this thread remind me of this bit by Paul Graham: If you're a database expert, don

It's the Gell-Mann Amnesia effect at full force. Meanwhile many comments in this thread remind me of this bit by Paul Graham: If you're a database expert, don't build a chat app for teenagers (unless you're also a teenager). Maybe it's a good idea, but you can't trust your judgment about that, so ignore it. There have to be other ideas that involve databases, and whose quality you can judge. Do you find it hard to come up with good ideas involving databases? That's because your expertise raises your standards. Your ideas about chat apps are just as bad, but you're giving yourself a Dunning-Kruger pass in that domain.