Back in 1991 I saw a paragraph in the Germania (?) B737 Company Operations manual which sent shivers down my spine at the time.
It stated: "Only under exceptional circumstances will manual flight be performed."
So this discussion about the need to keep your hand in has been going for at least 18 years and nothing has changed except the accent on full use of automation has steadily increased.
An occasional hand flown raw data ILS (auto-throttle use optional!) during cyclic simulator training sessions cannot, by any stretch of the imagination, constitute "keeping one's hand in on hand flying" Neither can an occasional hand flown ILS following the flight director, do anything to maintain one's pure flying skills.