He's spot on. You aren't lead by your passion you bring it with you. Few people are doing exactly what they want to do. Unless its extremely vague i.e. be my own boss. It's finding an opportunity and bringing your passion on board.
On a personal note, I never wanted to be anything. I've failed many reports/papers on "What I want to be" and "Where I'll be in 10 years". But it's all worked out. I do what I want, which ain't much. When I want, which is hardly ever. I'm able to pay the bills and then some. Seeing as I never wanted to do anything and now I'm making a living not doing anything. Dreams do come true
I've been making dough online since I was 14 mostly freelancing. This is the only job I've ever had and probably ever will.