Laugh if you like, but that’s good advice. I’ve resized and de-primed my thumb and/or finger more than once.
I’ve got an old Lyman Spar-T press that anytime my fingers were between the ram and die the handle would fall and it would bite me. Usually when I had a sizing/de-priming die lined up. Words can’t adequately express how it feels to have a de-priming pin driven thru a finger or thumb. It happened so often that I used a brazing rod and chunk of lead to make a counter weight....... I haven’t used it in years, but it’s still there, just waiting....
Those who beat their guns into plows, will plow for those who don't.-Thomas Jefferson