Stubbornness

Here is another of my games, where I planned to use the Dragon as black. My opponent did not follow main lines, yet somehow we reached a Sicilian position. The position was clearly a Najdorf, but since I don't know much about it, I decided to continue with Dragon moves.

In this game, been stubborn and continuing with my known opening worked, given some assistance from my opponent. But I still wonder about where the line is, when should one give up on pushing to reach a familiar position and just go with the flow.