Every human has breasts....be they male or female so to now have to say chest feeding sounds daft.
I don't mind gender neutral medical terms to be honest, it often is the case that Doctors use medical terms rather than the more colloquial ones non medical people will use.
What will become discriminatory in my view is forcing born women to change the way they speak about their own body to use gender neutral terms. I can't see how that could ever happen but if I were to have another child and want to feed my child using breast milk from my breasts I don't want to have to call it human milk