I haven't seen the latest video, but on older ones, there were people in wheel chairs in the town square during early evening entertainment.
If your Mom takes a look at the V cam showing the town squares, she might just see someone walking with the aid of a cane. As a matter of fact, I did today while taking a quick look at the Spanish Springs web cam.
What she must come to understand is those who do need a walking aid, still do what they have the ability to do when they want to. No one is pressuring them to do any more than they can physically do and no one takes exception to their more limited agility. There are so many things to do that don't require knowing how to line dance, learning how to line dance, golfing, playing tennis, pickleball, etc. There are pools where those with more limited mobility problems can "walk" the pool, being supported by the water makes walking easier and lots of people do water walk.
I have friends of all ages, some use canes, others don't. When we get older, hopefully we understand how our bodies might not work as well....heck our minds don't tell us we are older...
Please have her visit and when she does, go to the rec centers, the bowling alley, the squares....she'll see people using canes or walkers.