Well, now you know what exactly is going on. Your attitude is cautious, but correct. Why rush into surgery that may or may not improve the quality of your life? Hiking and some kettlebell work is not "nothing." You are doing more than 80% or more adults in the US.
I just saw a thing on Tai Chi tonight, on a local PM Magazine type show. It does look like a perfect complement for anyone, especially as we age. Is there perhaps a community class that is after work or on a weekend? The show I saw emphasized how Tai Chi works on flexibility and balance and doing the movements fast is a lot harder than most think.
Many years ago (1987?) my mom was taking my younger son for a walk by the lake near where she lived in San Diego. There was a group of older men practicing Tai Chi there and my son ran up to one of the men and grabbed onto his leg as he was doing a one leg balance thing, almost causing the man to fall! I am glad I was not there to see this, but I guess the guy had good balance from his daily practice...
2015 Trek Silque SSL
Specialized Oura
2011 Guru Praemio
Specialized Oura
2017 Specialized Ariel Sport