All true, but I think even more fundamentally, they treat all requirements as of equal importance, and reported based on the % of requirements met. The requirement to, for example, know at least one programming language, is different than the requirement to have experience with a particular IDE. Someone who does not have the latter requirement is probably much more likely to nonetheless get a callback, than someone who has no programming experience, even though each might be one "requirement".

Secondly, the people applying who have <100% of the requirements, know this, and are trying to guess if they meet all of the _actually_ required criteria. The ones who apply anyway, and get an interview, might be doing a better job at guessing which "requirements" are real.