True, but it's about what does are left to breed. A buck can't breed a dead doe, but he can breed one that is about to die. If he is able to breed 6 doe that year, more will survive if all 6 are safe from hunters.
The other thought is purely about the buck. Less does makes buck activity go up and good for hunters. But, it adds stress to the bucks and can take a toll.
It's probably a wash unless you can shoot as many doe as you want, whenever you want. We get one doe tag a year and it's lottery.