The business people are there to sell, period. They also have to tell the programmers what the product is so they can build it, but the way they figure out wha

The business people are there to sell, period. They also have to tell the programmers what the product is so they can build it, but the way they figure out what the product is, is by selling it. Selling is not a one-way flow of information where a salesperson asks people to buy something. It's also a process of probing and gathering information about what people want to buy, and that's arguably more important in a startup.