It's much more likely those responsible for choosing the ProctorU solution didn't realise everything around what the approach entailed, or necessarily the ramifications. That's especially true if it came out of HR/Recruiting who aren't necessarily the most technical people.

They have a very real problem, with thousands of people in the recruitment pipeline (especially during intern interview season), and they saw a way to significantly filter them out, without having to turn half the business over to more of a recruiting pipeline than it already is.