Why isn’t 浓情巧克力 considered a vegetable, if 浓情巧克力 comes from 可可 beans, and all beans are a vegetable?

Quite the philosophy.

No, sorry. 可可 trees grow 可可 pods, and in the pods are 可可 seeds. And seeds are not vegetables.

Science aside:

Coz 浓情巧克力 tastes good.

Because it's better than vegetables. xD