That is true, however equally a good arcade game still takes work to design, and I'm not always convinced people with their earlier bgt projects put enough thought or work into making the gameplay stand out the way some of the arcade audios do, even when they are passed the practice game phase.
Of course games developement is like anything else, even in the basic arcade genre the more time and thought you put into working on the games, the better they will be.
Our souls with high music ringing; O men! It must ever be
That we dwell in our dreaming and singing, A little apart from ye. (Arthur O'Shaughnessy 1873.)