It's worth pointing out that this isn't some hypothetical. Kangaroo meat is available at most grocery stores and butchers, it's fairly cheap, and quite delicious. It's the red meat I buy most often.
I live in a rural'ish area with a decent deer population [1] . Most residents see them as endearing, while a minority see them as pests. Go a bit farther out into more rural (but not boonies) areas where people do more serious (but still personal scale) agriculture on their properties, and the ag-pest attitude becomes much more prevalent.
Ask any winemaker and they'll call deer a pest.
Fwiw I'm in the "magical" camp (being neighbors with a deer rescuer will do that to you!) but understand the ag perspective.
[1] There's a family of deer that walk by my property every evening, and this morning I inadvertently startled a buck that was chilling out in front of the house -- they're very timid animals, which I guess is a big difference vs Kangaroos?
I know peers who get excited when we go for drives outside of the city limits, so they can see a Kangaroo. I get stressed out driving the car out of the city, because if you see a Kangaroo you're likely to run into it at a hundred k's an hour. They are a bit of a pest in the numbers they've expanded to.
I would eat a heap more of it, but its often ~ $16 a kilo when I can get chicken breast for $8
We switched our pets to kangaroo and feral goat, supplemented with some chicken necks and offal, with some veggie scraps for the dog. The price is not much different from processed pet food (~$4/kilo) but it's done amazing things for their health.