I interacted with someone with obvious physical problems. Was I wrong?

There is a lady who walks her dog around my neighborhood in Atlanta. She is hunchbacked/some kind of problem. Started waving to her, one day, riding my bike, I stopped and said hello, said I saw her around, I wanted to be friendly. She has now disappeared. I hope I did not set her back, she seemed nice, but maybe I should have left her alone? I feel bad for some reason.