It’s actually exactly in line with what the link above says.

In June 2015, the Cochrane Collaboration—a global independent network of researchers and health care professionals known for rigorous scientific reviews of public health policies—published an analysis of 20 key studies on water fluoridation. They found that while water fluoridation is effective at reducing tooth decay among children, “no studies that aimed to determine the effectiveness of water fluoridation for preventing caries [cavities] in adults met the review’s inclusion criteria.”

In other words, water fluoridation might not make much difference for adults, but it can for children.

Counterpoint: I live in an area without fluoridated water, and I’m told that dentists can reliably identify people who didn’t grow up here by the state of their teeth.

Well, that’s a completely different argument.

If something is wrong, then it’s wrong, regardless of how efficient or inefficient it is.

How much earlier are we talking? I bet if you asked prehistoric hunter-gatherers whether they thought animals experienced pain, they woulds say yes. The idea that animals were automata comes from Descartes.

What? The fact that plants physically react to being cut has absolutely no bearing on whether they have conscious experience.

How about I just get to eat meat because I consider it far more humane to be more efficient about proteins?

What does this have to do with anything? This is bringing efficiency to an ethics fight.

Believing a candidate when they tell you who they are is the opposite of delusion.