Fluoride can be bad for you, just at much higher doses than they put in water supply. It can cause issues with bones and neurological development. Again, only in very high doses over a long time. It happens a lot in poorer countries where they can’t treat well water.

https://en.m.wikipedia.org/wiki/Skeletal_fluorosis

You are right about trying to be power users. I switched to Linux recently and definitely struggled with my sudden reduction is understanding. I got everything I needed for gaming setup up in a few hours. Then I tried to set up some productivity workflows and slammed into a brick wall of my own ignorance. I definitely considered just going back to Windows.