Yep, and even when talking about living things it’s not a clear distinction.
In biology, poison is a substance that causes harm when an organism is exposed to it. Venom is a poison that enters the body through a sting or bite. In a bunch of medical fields though, poisons only apply to toxins that are ingested or absorbed through the skin and that definition sometimes carries across to zoology.
Venomous creatures are poisonous by most definitions because venom is a poison. But if the distinction is useful in a medical or zoological context then they’re not.
tldr: The pedantry of eg. correcting someone who says a snake is poisonous is totally pointless and mostly wrong.
Not American, or really knowledgeable about it but from the outside, I think this looks like ordinary politicking.
IVF is a proxy war for abortion. Dems want the talking point that abortion bans hurt/block IVF. Republicans/Trump want to remove that talking point by saying they love IVF “we want more babies right?” and will support laws to protect it as a separate and unrelated issue to abortion.
Dems put forward a bill that not only protects it but makes insurance companies pay for it. Trump is fine with that because it benefits him but Republicans in Congress get big money from insurance lobbyists and so they can’t vote for it. They also have fears that they’ll piss off their homophobic supporters by making them pay for something the gays might use (insurance costs will go up to help someone who isn’t me!").
Republicans put forward another bill that protects IVF without hurting their insurance company buddies but the Dems block it. Republicans then have to vote against the IVF bill and the Dems can now say “see! They really don’t care about reproductive rights at all!”
Feels a bit like nobody involved actually cares about IVF at all and just wants votes and lobbyist money.
In case this take comes across too centrist: Republicans and Trump are really quite shit.