Don’t worry, plenty left if you snuff a few. Just leave the bodies out and you’ll make a crow or three happy. I have had to help put down cattle after they broke a leg in a gopher hole. I don’t feel bad about varmint removal.
They do a lot of damage and pest control is needed. The local school board discovered that trying to keep the animal lovers happy got too expensive after kids were breaking ankles in gopher holes on the playground and they came out on the losing end of multiple expensive lawsuits. Suckers were making holes faster than maintenance could fill them.
Don’t those things build tunnels under your house and thereby destroy your property? Or is that a different animal? I had one once and it did a lot of damage in a very short time. Had to kill it.
I’m unsure if you should plant a garden but I think it would be ok to just let them be. though throwing out some bird seed can cause some plants to grow and might make the gophers happy with an added bonus of attracting birds