Hmmm, wonder if it was a miscue or the school requested the change.
I don't know if they got "official" permission to have a Mama Brubeck instead of a Daddy, but I'm sure the high school changed the line to reflect the change in gender. And the new line isn't actually new. When I was in Show Choir in high school (20+ years ago), we did the choral arrangement and it was
censored edited so that it could be taken out of context of the show and the "worries and strife" line is in that choral arrangement. They could very easily have just used that because it already exists and it works.