Jerry and Hodaka, I see your point. If someone put a safety on a double action revolver, I am sure I would consider it quite stupid.
All of my early long gun hunting and shooting was with pump shotguns and 22s, both bolt action and semi-auto. For me, it is such an ingrained habit to operate a manual safety with any long gun, that the CBS on a Marlin is just not a problem.
Based on my experience in teaching new shooters, the act of safely lowering a hammer is a skill that requires practice.... with 1911s, single action revolvers, and I suspect, lever guns with a half cock notch.
My wife has a recent vintage 336, a "Remlin", and she likes the cross bolt safety quite a bit. It gives her confidence to lower the hammer to half cock, and she also feels more confident in cycling unspent rounds out of the gun with the safety on.
Post number 500.... Woo-Hoo!