Setting aside for a moment the question of what Jed Marum wishes to do, people in general can mean different things when they say they want to create a score.

Do they want to:

Feed a recording into the computer and make sheet music for it? I don't think this can be done, and somebody has to break the news.

Play a piece on a keyboard and have the computer "Listen"? This requires super-accurate timing on the player's part. The internet is rife with unusable MIDI's full of unwanted dots which have been made in this way.

Learn to read music, buy a MIDI keyboard and enter the music note-by-note? This is what produces the best manuscripts, but beginners have to be told this upfront.

I mean to say, it's no good debating the benefits of Noteworthy vs Harmony vs Finale until you know whether they are willing to buy a MIDI keyboard, can read music, and know some harmony.