There’s nothing wrong with loving what you do, of course – I just don’t think it’s a prerequisite for starting a business or building a fulfilling career, let alone doing great work. In fact, I think it’s disingenuous for really successful people to put so much of the focus on love, just as it’s disingenuous for really rich people to say money doesn’t matter. People tend to romanticize their own motivations and histories. They value what matters to them now, and forget what really mattered to them when they started. It’s human nature, so it’s an easy thing to do.

The way I see it, many great businesses and important innovations are actually born out of frustration or even hate. Travis Kalanick and Garrett Camp, the co-founders of Uber, didn’t start their ride-sharing service because they loved transportation or logistics. They started it because they were pissed off that they couldn’t get a cab in San Francisco. Kalanick may love running Uber today, but he really hated not having a way to get home. A random brainstorming session one night in Paris turned that frustration into the seed of a multibillion-dollar company.

I talk to other entrepreneurs all the time, and many of their companies sprang into existence for similar reasons—because the founder wanted something that didn’t exist or scoped out an opportunity to do something better than it had been done before. Love for their subject matter may or may not play a role in their stories, but hate for the existing options, along with strong opinions about how things could work, does and is a much better predictor of success.