"why so few and why these crops"?

Does "why so few and why these crops" refer to "why so few (crops for us to eat) and why these crops (for us to eat)"?

Context:

Of Earth’s estimated 400,000 plant species, we could eat some 300,000, armed with the right imagination, boldness and preparation. Yet humans, possibly the supreme generalist, eat a mere 200 species globally, and half our plant-sourced protein and calories come from just three: maize, rice and wheat.

The obvious questions are why so few and why these crops? In The Nature of Crops, agronomist John Warren takes us on a journey through history where chance, fashion and the ingenious exploitation of biological adaptations interweave. It really didn’t have to be like this. Fat hen, for example, formerly a staple, could still rule the plate, and kiwi remain a pickable fruit alongside China’s rural roads.

MOre:
https://www.newscientist.com/article/mg22730301-400-the-nature-of-crops-why-do-we-eat-so-few-of-the-edible-plants/