And for that matter, why is raptor classified just for velociraptors and dromeosaurs?

I'm not an ornithologist, but it feels generalized.
I get the appeal for familiarity, but there needs to be a bit more room for accuracy.
There might be furries who are into zoology and taxonomy, you know.

Yes it feels bad to delete such precisions.
It should be implication, not alias.
I know there will be really not much use, but it is still bad to not allow it just for not being used enough.
And we could never know if it would have been useful to some people if it can't exist. Not only used for search because people could also learn bird's name through tags.