Huh, I see that totally differently. Having experienced a dramatic decline in a barn owner from healthy to frail to visiting her barn by specially arranged ambulance, it was OUR responsibility to keep her safe when she was frail, then using a walker, etc. Fellow boarder with a knee scooter - also our responsibility to keep her safe.
At the barn I’m at now there is one boarder in a wheelchair. The place does not “cater to people with disabilities” so it comes down to respect and courtesy and taking care of people who are less agile than the rest of us are. It’s OUR responsibility to get our horses good and bloody “chair broke” to keep everyone safe including our horses.
My horse was totally/can still be this way about clippers. Do I expect others to stop their grooming to cater to my precious little princess? No, my damn horse isn’t 100% clipper broke so if she can’t keep her shit together I remove her from the situation and go tack up/groom elsewhere.