The focus is on doing well in one's own discipline. Suppose that such a person, with lots of technical experience and no business experience, has an idea. Let this one be a good idea, with a really good market potential. Let's say it addresses a major problem and solves it. Such a person is a prime target for venture capitalists.
Venture capitalism exists for one reason alone.
That is to multiply funds by investing in risky businesses. The following example illustrates how venture capital investments make money for venture capitalists and founders alike. Imagine a game of chance where, if you throw a six on a die, you get back 10 times your investment. If you throw any other number, you lose all of your investment. The venture capitalist who invests in one big winner out of six can make a good deal of money.