Look at the northern white rhino. Functionally extinct, two females left, and BioRescue already created embryos from frozen eggs to implant into surrogates. That is de-extinction work, right now, pulling a species back from the edge.
My opponent says cloning living species is genetic rescue, not de-extinction. Fine, but that is exactly the point: it is one continuous pipeline. The toolkit that saves rhinos and ferrets is the toolkit that scales to vanished species.
The other side's 50 million dollar figure only matters if the money competes. It does not have to. Calling the whole field a fantasy because the mammoth is slow is just impatience dressed up as triage.