Is mowing your lawn cruel?
https://www.sciencedaily.com/releases/2014/09/140922145805.h...
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
Equating plant behavior/parts with their animal equivalent would mean you live in a constant state of guilt and horror.