Again...it is not. You can't just go and unplug swap anything anywhere into a PCIE slot. The protocol supports it, but it is not by any definition any sort of live swappable by default.
My speedometer says 200, but my car does not go that fast.
An egg isn't an omelet.
The statement "humans can fly" is technically true, but not without a plane.
A device that supports hot swap into a compatible and specifically configured slot could be though.