They definitely get wider. I have small, narrow feet consistent with my frame, and used to special order Red Wing work boots in narrow widths. When I reached my fifties, I was able to wear regular width off the shelf with no fitment issues, and no foot problems.
On the issue of the medical profession and foot issues, my wife has been around the block on this one. She has a trifecta of issues - neuropathy, arthritis, and plantar fascia problems. She had nerve release surgery in both feet. Doctor was a top neurosurgeon, and got a good result, to a point. Like so many issues with our cars, multiple factors at work. His release procedure was well executed, and brought immediate pain relief. He was also a superb diagnostician, and detected an underlying problem with the myelin (nerve insulation) which was not correctable. Zero help in managing that, she figured out solutions on her own. With some things the pros are great help, others not so much.
Wide shoes became a necessity. She now wears a EE width, and needs support, combined with no enclosure - heat sets off a downward spiral in her case. We all lose the fat padding in the ball of the foot with age, during my corporate days, many of my female co workers, as well as my wife, gave up high heels for this reason.
On the topic of mobility aids to deal with these issues as they advance, you may be better off talking to Mopar guys than "professionals." I have a friend in the hobby, who used to be therapist, and has used the stuff herself for over 50 years, claims she never got worthwhile advice from the medical establishment in that arena.