I don't understand the reporting to be honest. The accelerator fell under her foot and she panicked and applied too much pressure, presumably rather than applying the brake. So, the root of the issue appears to be as much an ill-maintained car as dangerous driving. Had it been regularly serviced and was the MOT current are reasonable questions imo.
Clearly a driving ban is required but not, in my opinion, a custodial service.
If people remain fit and well they should continue to drive. Age is just a number. My neighbour, 93, still drives to the local shops and local venues/days out. She is perfectly safe but has better sense than to venture beyond the local A roads.
My mother was similar and rove until late last year when she developed a heart condition and now suffers enduring dizzy spells despite successful surgery. I think it unlikely she will pick up her car keys again and she's only 88.
I'm in my mid sixties, still working full time, still capable of driving to Southern France, on my own. Some of the ageist comments on this thread are disgraceful and like race, sex, religion, disability, etc, are a protected characteristic.