On page 9 of my Dillon XL650 manual, it advises the lubrication of ALL brass, including pistol. Even Lee's manual recommends the lubing of pistol cases, particularly if you tumble them very clean.
It has nothing to do with user strength. I find that it makes a well tuned progressive press work smoother and thus faster. I get way more screw ups with my Dillon using unlubed pistol cases, enough to make about a 200 round per hour or more difference. A half second of spray lube over a cookie sheet filled with a couple thousand cases is worth my time.
Sometimes RTFM really does help. This is one of those occasions.