I once received some really great advice: never let your philosophy get in the way of results. Once you align yourself with an ideology (e.g., "I am a thumb-picker"), then you close your mind and rationalize your viewpoint. It is better to think of your goal and choose appropriate tools to achieve that goal.
Here's how I implemented that. First of all you need a base from which to operate; you need to find a style that works for you initially. For me it was using my index and middle finger in the picado style of flamenco tradition. I became comfortable with it and I still use it 90% of the time. However, I kept an open mind and when my style didn't fit my needs I incorporated other ideas. For instance, I started to use my thumb more for Travis picking or for getting a drone on the bass string.
I think it is important to establish a technique that works for you. Maybe it is thumb, maybe it is PIMA, maybe it is something else. Regardless invest yourself in whatever system works for you. Then be amenable to adapting your style when something else pops up. If, on the other hand, you try to find the perfect finger style, you will fail. It will be too hard and you will be discouraged. It is much better to take it step by step.
Coincidentally, I was just watching a video that illustrates this point. I was watching Jared James Nichols, a guitar player who doesn't use a plectrum of any sort. He used his thumb, he used his fingers. He basically uses whatever it takes to make the sound he wants. And that's my goal