Consider five HMAs in Wyoming covered by a 2021 EA for management actions therein:
If all of the horses were removed from Adobe Town, livestock equivalent to 2,688 wild horses would remain, putting the HMA at 3.4X AML. Not good for wildlife.
If all of the horses were removed from Great Divide Basin, livestock equivalent to 2,993 wild horses would remain, putting the HMA at 5.0X AML. Bad for rangeland health.
If Salt Wells Creek was depopulated of horses, livestock equivalent to 4,963 wild horses would remain, putting the HMA at 13.6X AML. A disaster by any standard.
If White Mountain was relieved of equines, livestock equivalent to 1,589 would remain, putting the HMA at 5.3X AML. Unacceptable.
If Little Colorado was subject to a 100% roundup, livestock equivalent to 3,750 wild horses would remain, putting the HMA at 37.5X AML. Immediate action required.
Curiously, nobody’s complaining. The horses are gone and that’s all that matters.
Western Horse Watchers Association 
Removing horses is all about appeasing the ranching industry. The BLM has decided to cater to these folks and remove anything and everything that competes for the free feed available on public land.
If preservation of public rangeland was truly the BLM objective, all cattle and sheep should be removed. Force the ranchers to pay their own feed bills and quit squatting on public lands.