GNU info pages have had a few jokes sprinkled around for long enough that I assume it has something to do with the environment at the MIT AI lab (e.g., https://www.gnu.org/software/libc/manual/html_node/strfry.ht... , https://www.gnu.org/software/libc/manual/html_node/Error-Cod... ). So I'm not surprised to see RMS push back on the change. I am surprised that he isn't effective at it.

glibc seems to be something that causes non-technical disputes every few years. I'm sure that's because it's central to almost everything but the kernel.