Of course the wiser thing would have been not to disrupt habitat--but in Chicago/Cook County and environs it was not just destruction of habitat, it was failure to manage habitat and populations effectively--hunting was strictly prohibited, and there were no major predators to prey on the deer. A population explosion was inevitable.I grew up in McHenry County, IL, about 40 miles NW of Cook County, which is where this issue occurred. This overpopulation was a result of severe reduction in the deer's habitat through a surge in deforestation and building. I take exception to calling the killing "necessary" when then deforestation that caused it was not necessary to begin with.
I experienced the same thing about 10 years ago in Mercer County, PA, where they removed a forest which was home to coyotes to build a Walmart Supercenter. This displaced the coyotes, which were forced into residential areas. Of course, there was a "necessary" culling of the coyote population as a result.
So, how do you think the population explosion should have been handled, that doesn't involve killing?
How do you propose that humans, who show no signs of doing things necessary to reduce their impact on natural ecosystems, start doing so? As long as humans continue to act as they do in encroaching on natural areas, they will NEED to (whether or not they actually do) take an active role in managing those remaining natural areas.