while I agree with the US comparison, America has a population of 350 million and not counting another 20 million illegals, the big companies know they will still make huge profit due to massive capital, advertisements, promotions at huge sporting and musical events, loyal base etc. they're not concerned with smaller craft beers companies cutting into their profit margin because most of them are brewed locally for local consumption and the ones that go nationwide are few and far in between. bottom line, America is a big country with a large population where the small guys can make money as well.
Thailand with its nepotism and chronic corruption is a bad place for inspiring entrepreneurs.