Maybe I haven't been as clear as I wished to be. Opera is not musicals and musicals are not Opera. Years ago the difference between voices trained for one or the other was not as great as it is now but it was always there. RCA released a 2 LP of selections from all of Lerner and Lowe's major successes. Stars were Robert Merrill, Jan Peerce and Jane Powell (sort of a popular voice but sort of operatic as well). Oy what a mess. Merrill and his brother in law Peerce had no business in this repertory. Not only could they have never acted the parts, they couldn't sing them with proper style. I once saw and reviewed a production of Into the Woods done by an opera company. Now ITW is probably Sondheim's least operatic score, its many vocal threads need mics to sort them out and keep them clear. I didn't even mention cast members by name because they were so completely miscast. Here you are absolutely correct, no one in his or her right mind would want to hear opera voices do that show, nor Company.