Some people like to play the "VC Exit" game and raise the money to grow a company to potentially become huge. Sure they could still grow with their own revenues, but a 6 million infusion will sure make it happen a lot faster.
Most of this everyone already knows. Just a lot of entrepreneurs out there that want to raise money when a) they havent done the simple things they should have or b) for validation and because tEh Bl0gz instill this need to raise VC to succeed.
if you spend the same amount of effort chasing paying customers, as you do chasing VCs, you'll be able to pay all your bills and then some with your revenue.
And hey if you end up needing a ton of cash later, you'll have a much easier time finding VCs to invest in you, seeing as how you'll have some real data to back up your claims
One problem, from the VC's perspective, is that if the startup starts selling successfully, they may not NEED VC.