On a structural perpetuation-of-the-organism level, no: you make a good point. On a personal level, I do find it weird that people take critiques of a system more personally than personal insults. We were all born into a system that we didn't create; we reshape it through the actions in our lives.
Are you surprised that the system (and the people within it) reacts to broad-based accusations about its structure, rather differently from how it reacts to angry beefs between individuals?