I am implying nothing. I don't work in the field, and, as you say, have no idea what is or isn't being done. If, as you suggest, the kind of work being suggested by the author is being worked on, that probably would have been a more useful comment than the one you made, which didn't imply anything of the sort and seemed pretty defeatist and just "that's the way it is", which is what prompted my reply.
