Venture Capital is how entrepreneurs get off the ground and are able to try out new ideas. It is of both the entrepreneur's interest and the investors' interest that the product or service being developed captures value in the market, so they can reimburse their original investments. Without Venture Capital, we are limiting business creation to people who are already wealthy, which severely limits the pool of potential creativity that the society can utilize.
We have regulations in place to make it more difficult and more risky for businesses to engage in immoral behavior, but these regulations usually appear after observing bad behavior.