Mr Goenka’s singing

I’ve just finished my first full 10 day vipassana course, hooray! I feel grateful beyond measure to Mr Goenka and all the volunteers who made it possible. So much good. So much love. I have a question I would like to ask. I respectfully find Mr Goenka’s singing difficult to, especially the really long excerpts towards end of the course. Why are these bits necessary to learn the technique? I think the singing might be why a lot of people drop out.