The initial hump in hiring is always the shortlist - you might get a hundred (or a thousand!) CVs and you can maybe first-interview 10 and second-interview 2-3. So the priority is always to get down to a manageable list by rejecting candidates who are obviously unsuitable.

So you are correct, but you could probably even trust your HR department armed with a suitable list of esoteric languages keywords (instead of their usual "Java" etc) to build you a pretty good first-interview shortlist, even if you were after Java developers.