I'm not the PP you quoted but my I add my thoughts?
Most people on an interview panel have little to no interviewing experience so they read it up to prepare themselves and these kinds of questions are suggested as a way to test thinking speed, ability, creativity, and personality. All sounds good, except that it doesn't often do any of those things, mostly because the askers have no idea how to assess those things from the answers given. That makes them pointless.
On the interviewees side there are two main ways people answer these questions. Firstly they have been to a few recent interviews and because these questions come in an out of fashion they've looked it up as a textbook answer and give the interviewers that. Or it's the first time they encoutered the question and a period of silence dotted with umms and ahhs ensure while they try and think of an answer and then worry about their answers later. They can also make candidates wonder if they were some kind of trap, it can make an interview become a little hostile too.
None of those things actually tell the interviewers anything other than whether they've come across that question before or not. It's a very inefficient way to assess anything.
It's also pretty disrespectful. The interviewee may have done the legwork or finding out about the company, the aims, objectives, ethos, personalities etc. They've had to do this over and over again for others. These questions make many wonder if the interviewers have prepared for the interview, whether asking irrelevant questions, wasting time, and playing mind games is part and parcel of the company ethos too, or whether planning and leadership of their teams is as poor as the interview techniques they display.
Companies forget that it is not just the candidate who is being interviewed, they are too. They lose good candidates through asking questions, the answers to which, are not fully understood by the panel or even why they are properly relevant because most times they have no relevance and they are certainly not the best way to allow people to showcase their abilities to think quickly or display ideal personality traits and they can reflect very badly on the company too. It's very rarely an answer to those questions that tip it in the candidates favour because as I said previously they've usually made up their mind by the time they get to these questions anyway.