I don’t see an issue with that comment. Sometimes when people ask this, it opens another dimension of discussion and comparisons. Maybe there is already a library and someone will post it. Maybe it will encourage someone to create one, given that there are people out there requesting it. Among other positive reasons, not everything is negative or should be assumed that way.
I found the comment you replied to completely reasonable (see my other comment above).
You're making a lot of negative assumptions here, but more importantly, your comment is unpleasant beyond what they warrant, even if they were true.
This website has a bias for rust related projects, they seem to be on a crusade to promote that language and to devalue everything that's not written with it