I generally agree with hiding instead of removing for customers who will just mar the paint again anyhow. If (big "if", but it *is* possible

) you can avoid marring it, and have plenty of paint to work with, then sure, remove 'em.
Note that I am by no means an expert with the rotary. I hadn't used one for over 20 years, until I got tired of marring in the hard Audi clear, and I still don't use it unless I really need its power. But then I took it right out of the box and used it on my 5K mile S8 so maybe I'm, uhm, "different"
If I were a pro, sometimes I'd use the rotary (even if you're no expert) just to remove a lot of the marring and/or save time. When I did then black rent-a-Suburban (probably pretty much like what pros deal with both as far as condition and finished product expectations) I tried the Cyclo and the PC with 4" pads, and those approaches just weren't gonna cut it. So I hit it with the rotary and a mild product (3m PI-III RC 05933/polishing pad). I then immediately did it again with the Cyclo and the same product. No holograms (almost certainly thanks to the Cyclo), no problems, *almost* ready-to-wax finish. Anything that was left wouldn't have bothered most people but no it wasn't perfect. No way was I gonna risk messing up the paint on somebody else's vehicle (sounds like a pro's dilemma, huh). So I then used the PC with #80 then waxed. It turned heads for the month+ I was driving it and the rental guy almost fainted when he saw how nice it looked.
On our MPV I can remove all but the worst marring with the PC/4" pads or the Cyclo. Same was true of the WRX we had. I was pretty surprised when the same approach didn't work on the Suburban, but it was a lot more messed up than our vehicles ever get.