For the same reason that there is a maximum of people that will go into math and science. It is looked at as one of the hard jobs, where smart technical people

For the same reason that there is a maximum of people that will go into math and science. It is looked at as one of the hard jobs, where smart technical people go to. A majority of the population does not fancy themselves as technically smart and hate logical puzzles. They view the market as something other people do. It is the same mindset of the founder "just looking for someone to build it". The though of learning it themselves, literally never crosses their mind because, they are not of that personality type. It's akin to saying people that go into finance where worth their weight in gold in the 90's, why didn't you go into finance, may of us did in a way, but most of us used a wealth manager, broker, mutual fund to do so. Developers are like that wealth manager, they do all the technical work that investors do not want to do. Some people take the time to learn the models and self direct their investments, but they are the minority. Most use a professional, though I doubt many investment professionals had to deal with the: "hey I have an idea I want you to build, I have no money, but I will cut you in for 10% propositions".