In the book Range by David Epstein [0], he mentions that research has shown that groups of people with very mixed backgrounds leads to much faster rates of problem solving and innovation. The reasoning is that someone will have an experience or piece of knowledge that directly applies to the problem.
As an example, two different groups were given the same problem to solve. One was a homogeneous group of academics. The other had a mixture of academics and non-academics. Both had to solve a problem that involved flowing liquid. The mixed group solved it faster due to one of them having had a father who was a plumber.