It’s the case of pretty much every grown food product. As a comment above it comes down to the incentives / optimisations of a grocery store.

In this case I think the American fig fell victim to disease more than optimization. But perhaps those are related too.

Disease is definitely a good point, some varieties have disappeared or severely contracted in range due to diseases and pests.

I’ll have to read up if the fig was a monoculture like bananas and therefore disease is kind of a consequence of what you’re pointing out.