I love coffee. Not the cheap stuff made of sawdust and and whatever came to hand at the factory, but real, good coffee. I buy whole beans, and grind them as I need them.
I've done a lot of reading about coffee over the years, and have learned some things.
First, coffee apparently started out in 9th century Ethiopia.
Second, there are two species that are grown commercially:
coffea robusta and
c. arabica. The first is bitter, but ultimately very inexpensive. Nobody sells pure robusta beans that I'm aware of, as the beverage would be too nasty to drink. Rather, they are used to blend with the more expensive arabica beans to cut the price/increase the profit margin.
Third, and more to the point, the really good coffee is pure arabica, but not all arabicas taste the same. You see, even though they all are the same species, differences of soil, micro-organisms, climate, season, altitude, harvesting, and preparation techniques give different flavors. They're all coffee, all arabica, yet culture makes them somewhat different.
Jesus compared God's message about the kingdom to seed in Matthew 13. If I may employ my coffee metaphor, the coffee bean grows coffee, but the culture causes the flavor of the coffee to vary. The cultural variation doesn't make it not coffee.
Further, if I try to grow coffee in Mexico, and make it exactly the same as coffee in Kona, Hawaii–or 9th century Ethiopia–I'll probably not have good results. At best, I'll have some twisted plant that, with a great deal of effort, only approximates the goal; at worst, I'll have a dead coffee plant with no fruit. If, instead, I plant the bean in Mexico, and cultivate it in the local environment, I'll have a coffee plant that is impacted by that culture, and whose beans have a unique, local flavor. But, it will still be coffee.