Then I am not quite understanding why you posted this thread if you aren't willing to attempt to solve the issue, think that it is something minor, and believe that your condition is too weird to be cured (when in fact neuropathy is not that rare). If you want to wait until you can't feel your feet anymore, then that's your choice, but I'd choose to address it sooner rather than later.
Mashing vs spinning refers to cadence, not speed. A higher cadence is generally easier on the knees.