I only knew about it because my brother-in-law did film production for the Christian Scientists, and knew all about it, so everyone in his family knew of it.
LOL, he would sometimes mutter with a grin “Mary Baker Eddy! Mary Baker Eddy!” like it was a prayer mantra! (He wasn’t a Christian Scientist, but got enjoyment out of poking them a bit...)
I actually knew a kid who was a graduate of Principe College - that’s a small liberal arts college in downstate Illinois associated with the Christian Scientists. He was actually a pretty good guy, and very smart; by the time he got married a few years after graduating, he was dealing with standard medicine almost as much as you’d see in the general population. I expect his wife had something to do with that.