For me poker is neither a hobby nor a passion, for me poker is an opportunity to get money.
Probably there are people for whom poker is both a hobby and a passion, and the money received from playing poker is just a side effect.
And if you think about it, then probably if you want to succeed in any of your business, you need a passion for this business, make mistakes a thousand times and still continue to do it until it turns out.
Success is not final, failures are not fatal, only the courage to continue matters. @ Winston Churchill.
Probably this is the passion, to continue no matter what.