But you're worrying about a problem you don't have and probably won't have. If that's your reasoning behind not doing "x" then I'd argue that you may not be cut

But you're worrying about a problem you don't have and probably won't have. If that's your reasoning behind not doing "x" then I'd argue that you may not be cut out for being an entrepreneur. The entrepreneurs I know tend to be the ones who try to find the way to make it work instead of the type who pessimistically rejects an idea because of the types of reasons you give. Reminds me of a conversation I had recently about taxes - I groaned that it was tax time and the guy I was talking to said that he liked being in the lower tax bracket because he gets a tax refund every year.