Not every elderly driver is terrible on clutches, but some are, and get worse with age.
One of my (now deceased) customers had a fear of getting stuck in the Dartford tunnel at rush hour, (when it became stop-start while underground) so he slipped the clutch like mad to avoid stalling, every year a new clutch. he was only 50 odd, he died at 56, quite soon after his wife died.
I really didn't like the hc, the ha or the hb were far better and very much lighter. I raced an HB with quite reasonable success in a semi contact formula in 1984.