When I ruptured my ACL and tore my meniscus, surgical repair or replacement was presented as the only option. However, I never met anyone who, after the surgery, told me, "I feel so much better; this is the outcome I was hoping for."
So I chose not to go that route. In fairness, I was also given the option of having the surgery in the future should I choose, and I might.
I feel the most important lesson I had to apply to my aerobics routine was embracing the anaerobic. I had to focus on muscular development across the entire leg and hip. I leaned on controlled single-leg and hip exercises, monitored changes closely, and resisted the temptation to load volume, be it weight or activity, that might trigger inflammation or stall progress.
The second lesson I learned (sometimes painfully) is simple and universal: "You can't bully your body into submission." You must respect the limits first, then build around them. That respect is what makes it possible to keep pushing forward without losing the activities you love. It has been amazing in my career to help other people use that lesson when dealing with their own issues.