I think there are many reasons. However, the most obvious one is lack of technical skills. Let me explain. A while back I was thinking of importing a machine. The problem is, I know what it does, but I don't know how to operate it. Even if I knew, I would have to train people how to use it which takes time and money. So, even if you desire to get into manufacturing, the technical skills needed are scarce and too expensive. Most manufacturing startups cannot afford to hire skilled technical labor which is the main problem. As such, we are forced to stick to mainstream investments. How many chemical engineers are in Kenya? How many chemical engineers in Kenya know how to operate the machine? Can you afford paying a chemical engineer who knows how to operate the machine? Obviously not. Only the government can, but it won't because it doesn't care