Witnessing is an experience. That's your experience. You are conquoring the desire to interact with nature, fulfilling your ego goal of passive acceptance.
What a tortured twisting of my words, of course witnessing is an experience, it is an experience that brings you outside yourself unlike a physical battle with the limits of your body that draws you inward.
I joke - but really, go to a hiking trail sometime and tell all the people who show up to hike they are all selfish and egotistical for wanting to hike the whole trail instead of just stopping whenever the mood strikes them and going home.
Why would I do that?