A few points here:
I'm sorry you feel disgusted and that I'm ignorant. I assure you neither feeling is justified.
Customers do pay my salary and I'm quite thankful. I'm very happy to help every customer to the fullest of my ability, and, if anything I enjoy getting to do something out of the ordinary once and a while (i.e helping a special service customer). While I see how you could assume otherwise, I assure you my job performance and personal feelings are in two entirely separate realms. I'm sure others would agree that I certainly don't reflect poorly on my wonderful employer. The treatment my customers receive is much better than the treatment I receive from them.
I'm not sure how you can liken my specific problem with transporting certain impaired individuals to a generally held stereotype of the disabled that prevailed many years ago. I'm afraid we've swung too far in the opposite direction with some provisions of the ACAA and ADA.
However, you're right on one point: I certainly do worry about my back. I'd much prefer to lift people and their bags all day than not be able to. Not selfish, smart.
It's not about being more important than others, it's about safety. I've said that before and I'll say it again. I'd absolutely hate for one of our aircraft to crash. However, I'd be devastated if a customer who physically couldn't exit the aircraft died.
I see how proud you are to be who you are; my remarks may not be PC or even popular, but I publish my real name. Where's yours?
I submit my original question again: In an industry consumed by safety, why do we allow people who require major mobility assistance (i.e. they can't support their weight on an inclined plane) to fly?