There's more to toribash than farming. Farming is obvious and when they're a lot of people watching, they get caught long before they earn any significant amount.
The tourney rooms get way to crowded as it is. Even today people are complaining about the multiclienting restrictions. So if you've been playing toribash for a few weeks, you'll have enough qi to play in the tourneys. If you haven't been playing toribash, you obviously don't need to win tourneys.