People who don't think of Comp Sci knowledge as a set of substantive first principles, just as meaningless tokens they need to memorize and regurgitate to get the job -- those are precisely the people who should be weeded out.
And yet - those are the people who are not weeded out, but selected for by the default interview process.
And yet - those are the people who are not weeded out, but selected for by the default interview process.