> If it exits, who cares if the memory of the process is corrupted?

People care when memory is corrupted without the process exiting. It is usually better for a program to crash than for it to continue having corrupted its data. The former gives you x-ray machines which sometimes won't start, whilst the latter gives you x-ray machines which sometimes give the patient cancer.

I say better, not best. Best, obviously, is for as many failure modes as possible to be detected before the code is deployed. Particularly if you're programming a machine that can kill people. But in the comparison between Go's interface{} and C's void*, neither language has that option.