They technically gain some with the niche over other options but certainly not the lion's share as they are very commoditized and not the bottleneck of scarcity at all. Shippers and retailers make more and it is far more expensive for them to get into it than to run their own local banana farm. Credit is also less accessible.

Low capital banana growers would do far worse if they tried to compete by growing grain crops in the region as they have to contend with high capital mechanized and chemical using operations with massively better yield and closer markets.

Specialization is at least a local maximia to them even if there are other options better in the long term. Take say West Virgina's coal mining vs a more diversified industry.