Dear Sally/airspeed999
As a cabin crew member I am quite aware that many think of us as waitresses in the sky. I just sincerely hope for your sake that next time you fly you don't develope a dvt, have a heart attack, cover yourself in vomit or find yourself on an aircraft where there is an oven fire and hence depend on your 'waitress' to take care of anything other than chicken or beef for you.
I also hope and pray that you never have a son or daughter who wishes to fly as cabin crew, It would be very hard to hear your mother belittle your chosen career in such a way.