It's just laziness incarnate. This pushes all the investment of the first phase of interviewing someone onto an automated process and denies the candidate the opportunity to vet the company which is just as important as the reverse.

Well, actually they do allow the candidate to vet the company: the message they send is we don't care about you at all until you do a bunch of busywork and if you're very lucky we might allow a human to spend some cycles on reviewing your results.

If as a company that is the kind of message you would want your prospective employees to have that's fine with me but it would be good to remember that interviewing a candidate is a two way street.