If restoring ecological function is the goal, why reach for the most expensive, unproven tool first? My opponent's measurable-benefit test is fair, and reviving a keystone grazer could help in theory. But de-extinction usually fails that test: a handful of clones isn't a functioning population, with no genetic diversity, and the ibex died within minutes. Meanwhile, the money and attention drain from protecting living species and intact habitats that already do the job. That's the real conservation we should fund. The fantasy isn't the dinosaur; it's thinking this scales.