Growing food creates wealth. Consuming food does not create wealth.
A question of the chicken and the egg.
Consumption creates the need to fill the need, which requires the creation of production to fill the need.
This is quite a fraught issue in development economics.
The US produces a lot and therefore consumes a lot, or perhaps it produces a lot because it wants to consume a lot. Your call.
In any case, cockfighting requires the breeding of champion roosters, the creation of sometimes fancy venues (there are some doozies in the Philippines for instance), hawkers and vendors, etc. Consider it as a form of professional sport, with football and basketball stadiums.