You had me until this part:
personally? i'm a floridian and hate desantis and i don't think this bill is that big of a deal.
Key passage in your post:
in my opinion, if there's a waste product we can use as building material and we can determine it won't cause harm to people or the environment.. why shouldn't we use it?
This is troubling because the general trend for SCOTUS and for specific state legislations, such as Florida, is that they move forward with harmful activities despite the demonstrated harm it could causes humans or the environment. SCOTUS has started really going after dismantling the EPA and taking the teeth out of its policies, so when you mention that all of this testing and proof needs to be completed within a year, that's really just a comment on how little oversight the EPA may still have by the time there's a moment of reckoning for this safety study.