There’s a legitimate debate to be had about adding fluoride to drinking water. The practice has long been lauded as a victory for dental health because the chemical can strengthen tooth enamel and prevent cavities. But too much of it presents real health risks.In other words, the issue is complicated and calls for nuance and respect for science. Unfortunately, many politicians — cheered on by Health and Human Services Secretary Robert F. Kennedy Jr. — have opted for over-the-top rhetoric and ham-fisted bans.Kennedy has described fluoride, a naturally occurring mineral, as “industrial waste” and a “dangerous neurotoxin.” He has vowed...