I know that “uncurious” is an odd word. I didn’t even know that it was a real word until recently.
That said, it is really a mega derailer. Think about it this way, a lack of curiosity is actually arrogance. Clearly if you know it all, there is little you can learn from others – which could result in your missing something important and losing a both opportunities and allies.
So I suggest finding a low risk area where you could experiment with curiosity. You might even have fun in the process!