[fivedogit]

Oh I think you absolutely can. In 2002-3 I worked at a PR firm in DC and identified a shortcoming we were experiencing regarding broadcast TV monitoring. I quit my job, built a distributed TV ingestion system + SaaS interface and signed 75 customers to paying subscriptions over the course of a few years.

Did I have any "passion" for broadcast monitoring? Absolutely not. I merely had a passion for starting a successful business.