Okay, you got me. Farming and agriculture is not my wheelhouse, so I can't really discuss it with a high level of confidence or familiarity. But AFAIK the gates foundation doesn't make anyone buy anything, they issue grants. They have identified the root cause of yields in agriculture is the soil/seeds. Maybe the problem can be solved without pest/soil resistant GM seeds, but the fact remains that the food supply situation is getting worse on that continent. I'm sure there are other aspects to it like distribution/infrastructure/government investment/etc.

Also to your specific point - according to their own website https://agra.org/faqs/#1518765023405-cb110e47-d755

"AGRA has never taken a monocropping approach to agricultural development. We have invested millions of dollars in breeding minor crops grown by smallholder farmers in order to help them maintain diversity even as agricultural systems intensify."

I'm not going to blindly believe them, I'll give them a chance to make their case...