I lead the growth team now, and I'm on the hook for numbers I can only move by getting other people to move them. I used to love running the experiments myself, the little rush when a test actually worked. Now I sit in reviews answering for results I didn't get to build, and the part of the job I loved is the part I gave away.
More people experience this than they realize.
You answer for the numbers but had to hand off the experiments you loved running.
If this sounds familiar, the Library can help you find the bigger picture.