For what it's worth 20 years ago I went through something similar with my mom (not gymnastics, but another sport), and everything worked out just fine, and in a short enough time my DD will make a life decision that I'm sure that DW and I will second guess, but as a parent you have to let them find their own way. You just have to trust that you have prepared them enough to make good choices for themselves. I feel like the rigorous and challenge of gymnastics is one of the tools that they will use for life even if it isn't directly for gymnastics.
On a side note, I had to step away from my sport for a few years before I wanted anything to do with it again, but eventually I ended up volunteer coaching it.