That about self-chosen cadence is a so-so thing.
I am consistently slightly faster at my ”natural” cadence, at around 75.
However, for any ride longer than 30-45 minutes, it will leave me with aching knees the day after.
”Forcing” myself to a cadence of 85+ will leave me fit to ride the next day too.
Otherwise, ”ain’t broke, don’t fix”.
Sometimes there is no appreciable difference between ”good enough” and ”better”.