It is for cultural and geographic reasons. Goats work really well in arid regions because they survive on brush. But cows and sheep are much more productive in

It is for cultural and geographic reasons. Goats work really well in arid regions because they survive on brush. But cows and sheep are much more productive in grass areas. So Northern europeans didn't really heavily use domesticated goats. The Spanish and Portuguese brought them to Latin America. But American culture developed in areas settled by English and fueled by Northern European immigration.