I know the real goal of the republican calendar was to undermine the Church's power by making it so Sundays would fall at random days of the week, and also screw over the workers by leaving them with a worse weekend-to-week ratio.

However, all I ever read about this part of the revolution seems to indicate that people just didn't comply and went to church anyway on Sundays, and also didn't work that day. On that account, I feel likr your quote is kind of partisan. People wouldn't have been left lost and aimlessly drinking on their tenth day because of a lack of God, because they never quit going to church!