Some people, including my friend in Arizona sit in a roller chair while quilting, she chose a frame that had the height options. She says you quickly get used to scooting around with your feet and don't notice it after awhile.
I've found that I would much rather stand/dance (and I could learn to scoot) along with the machine head than sit and guide the fabric with my upper body. Takes all kinds... we just have to find what works for us.