Perhaps those features just make sense, and they complain because they didn't think of them first?
Anyway, nothing prevents them from implementing what's missing on their side.
In related news, *bsd came up with strlcpy(). Do we go to them and complain that it's non-standard? No, we go to our libc maintainer and complain that he doesn't want to include that in the standard library.
I see a fundamental asymmetry here. Which might just be part of the reason there are >=3 BSDs out there, but just one single Linux. :-P