The business domain is interesting, and intellectually deep and rewarding, but without the money, all interest goes away. The money is the point.
With tech, there are complicated technical mechanisms. They still exist to make money, but, there are many layers of translation in between. And it seems easier for humans to be interested in computers in a more pure way, because of these layers between. Kinda like how a gift card "feels" more personal than cash even though it's a strictly worse gift.
So I think business school attracts many more "ends justifies the means" types of people because of these inherent properties.