Without natural predators like wolves, bears, or bobcats, the deer population in certain areas of the United States has exploded(1). This negatively impacts overall biodiversity(2). I doubt deer like being eaten, but that's the process of life, and its vital to maintain the existing biodiversity we enjoy today.

So why would you feel guilt for the cycle of nature? Without deer, buffalo, or other herbivores in suburbia or urban environments, there has to be something to check plant growth.

(1)https://blog.nature.org/science/2013/08/22/too-many-deer/ (2)https://sciencing.com/purpose-deer-ecosystem-8659608.html