It baffles me why someone would want to start a business when they don't have an idea. That's backwards. You should only desire to start a business once you have had an idea that is burning in you so badly that you can't do anything else.
Just as lots of developers have a great product, with business model and no idea how to market it (the product) - Lots if small businesspersons have a business model and the will to market a great product - but no great product to market