[abhaga]

Actually bananas are a huge deal since they provide the basic nutrition for large populations in many parts of the world. Also Cavendish is the dominant set of varieties world over and there are not many real substitutes for it, yet.

[mikeash]

They could grow something else to eat, at least in theory, right? A realistic extinction event should leave plenty of time to switch to another crop.

If bananas went extinct (while people dependent on them were able to switch to some other food), I'd basically just shrug and get on with life. If chocolate went extinct I'd consider it a colossal disaster. I suspect I'm not alone.

[abhaga]

I understand that there are a lot of people who care about chocolate and who don't care about banana. I know plenty in the other direction (majority around me).

But there are two points. First is that you are underestimating the kind of role a crop can play in a culture. It is not just a matter of replacing Banana with another crop. It is a matter of changing significant cultural traditions going back hundreds of years. If you think about it, the importance of chocolate is also largely cultural.

Second, it is a philosophical debate that what is more important - something that is basic nutrition for one group or something that is cultural/emotional/luxury/(I can't find the right word for the role chocolate plays) for another. Where the resources will be allocated will depend on who controls those resources and which camp they fall in.