To a question about how to move from rules to principles and choices:
Gradually, without fanfare, be more positive and more supportive of her desires and requests.
Here is an antidote to your no-speed-limits fear. It's called "The Beautiful Park" by Robyn Coburn. It's about people getting off bicycles to walk. I think it could replace your fearful background with something gentle and peaceful.
Read about why, and what others have seen.
Try it a little.
Don't expect her not to think you're crazy at first; wait a while.
Watch her reaction. Feel your own thoughts. Lay your fears out to dry in the air and sunshine.
photo by Cally Brown