that ain't an antivax post its an anti-fluoride post
honestly idgaf if fluoride is in water or not it doesn't change much
fluoride is often used in the treatment of water as it's tough on bacteria but not tough on animal cells (like human cells for example)
as long as a shitton of fluoride doesn't end up directly in your bloodstream you should be good
if anything the average person probably has more plastic than fluoride