If you can't find a single software developer who believes in your plan for better APIs or project management tools or consumer internet apps, it's a pretty good heuristic that your vision or ability to sell it sucks, or that you add less value than the dozen other people that talked to them about chatbots for X this week. Any prospective technical co-founder has a huge amount of insight into those markets. On the other hand, unwillingness of software developers to believe that the dullest sounding CRUD app going will be very exciting to grey suited men controlling a little known niche (probably precisely because hardly anyone's writing software for it) doesn't actually mean there isn't a market there.
“We’re making the world a better place through paxos algorithms for consensus protocols.”
“We’re making the world a better place though software defined data centers for cloud computing.”
“We’re making the world a better place through canonical data models to communicate between end points.”
“We’re making the world a better place through scalable, fault tolerant distributed databases with acid transactions.”
https://www.youtube.com/watch?v=B8C5sjjhssoThe scenario in tech is more often comparable to some dude saying "I want to make a business selling the greatest hot sauce ever" and then having to go looking for someone who actually knows anything about hot sauce.