I'm not sure why they would be more skilled than any random people off the street, or a coin flip, etc. There's no reason to think they produce a result better than whatever control group you can think of compared to any other subset of people.
A company without investors is a bootstrapped small business. Investors without a company are venture capitalists. Without investors, a company never becomes a startup, never has front-page articles in newspapers and magazines, never gets invited onto cable news for interviews, never hires expensive talent, never buys sports cars for its executives, never spends millions of dollars on advertising, etc.
Without investors, Holmes never would have mattered. The investments are what enabled her to commit the fraud.