What about those that stuck with an idea and hit gold eventually at some point? What if failing fast is too fast and you don't give an idea enough time to grow? MVPs and failing fast is an idea that started in the past ~7 years, and it works for some people and not for others.
I didn't imply there weren't other ways to make it. But there are only a few ways to hedge as an individual dev. One of them is to shoot with a shotgun. It's more or less what incubators attempt to do, but spread out over times since each of us only has one brain to go around.