My mum used a stick the last few years of her life. She wasn't disabled, in fact she was pretty active for her late late 70s but she had a fear of falling so it gave her a bit of stability and helped her confidence which meant she didn't stop going out.
She bought it off a stall in an indoor market, the stall specialised in mobility aids for elderly. It was brightly patterned and only cost around £15. She was able to test it beforehand to make sure she was happy with it. My point is that she didn't need a proper assessment, she only needed it for confidence (and it helped massively with that). If she did I can't see her wanting to get one from a shopping channel, she would have sought proper advice (I would have made sure she did). And she was totally involved in the whole process, she didn't leave me to sort it out for her.
I still can't get over the 'feigning a limp', that's totally unacceptable. Perhaps the crew members who read this would like to pass this on. Unless they're too scared to challenge the Cockney Geezer or any other presenter who does this.