It's important to consider that most businesses that start in new areas/ try re-defining the market don't have business models, as they are too small to build a model from. Sure they can bootstrap from one idea to the next until something takes hold, but unless it's a new paradigm that is on the cusp, you're many years (think 5+) from attaining a scalable model.
The funding is to be able to hire people, and iterate quickly to expand the business, and find a scalable business model. Trying to build a business model with out a pre-existing business is like trying to solve for x when the right side of the equation is missing. You'll come up with answers, but they're probably wrong once tested.
That's sad and I disagree - category creation is amazing. Though indeed, I've observed that almost all VC's are indeed against this until it's been handed to them on a silver platter, despite what they may believe about themselves and their firms. So the tricky part is how to fund it over time :)
They're people as well, the good ones use it as a way to test the conviction of the founding team. If they can't take a few verbal licks, why would they be able to acquire enough customers to gain traction? Not a perfect test, but it has proven to be a workable process where the ones with the most conviction always get _something_. Sometimes it's too late, and sometimes it doesn't work out. That's life.
