Already went over this: The proposal is to investigate re-adding trace elements of metals due to their apparent benefits and our diets generally lacking some of them. These are not clinical doses. These are not side-effect inducing doses. In fact, these aren't "doses" inasmuch as often naturally occurring remnants we end up filtering out. These are amounts so entirely small it's still up in the air whether the correlation is in fact due to trace lithium at all, and only detectable in large populations not individuals, and only then just significant.

Also, these are experts. Not with quotes. People who clearly know a lot more about this than OP, for one, who seems to think this is some grand conspiracy to dose the population. To preempt the exact same nonsense from before, if anyone is going to claim "lithium bad", the "bad" is in the dosage. Too much of anything is bad. Trace amounts in this instant are so small as to be harmless by far.

Put another way, none of you cry conspiracy or claim people are "experts" with scare quotes when filtration removed all the naturally occurring things humans have been drinking for long before we were humans. Yet in any proposal to readd elements or other things formerly in that water, you freak out. This is entirely about short sighted contrarianism and nothing more.