The Big Ten were written at a time when paganism/animism was the dominant religious view and the idea of monotheism was weird and foreign. You really had to hammer those home early on, because one minute you’re up on a mountain having the acid trip spiritual moment to define a millennium and the next you’re down in the valley watching all your friends jerk off to a big bronze bull just like you told them not to!
When your parish flock is that prone to stray, I’m almost surprised they don’t have a few more.