I feel like it's a do-or-die caveman instinct or something.
I was hanging out with a group of people in my friend's backyard. We were supposed to have a bonfire, but the wood was wet and wasn't burning. We used all sorts of fuel, fire starters, etc. I saw what looked like corner of a log turn into ember, so wouldn't give up. Never got a flame when we were there, of course.
I felt very proud though when my friend sent me door camera footage of the firepit turning into a massive blaze in the middle of night that woke her up.