Netflix is very (in)famous for their culture deck. I could understand they got a little piqued. Assuming you did not read it before the interview, they are looking for: good judgment, communicative, impactful, curious, innovative, courageous, passionate, honest, not selfish, performant, smart, professional team players. Hah.

https://www.slideshare.net/reed2001/culture-1798664 (17 million + views)

I am on the fence about the second part of your question. On the one hand: If they are free to grill you about hypotheticals and process, why can't you do the same? On the other hand, should you really? It is a very cheeky ("courageous") question that would catch me off guard. "Who are you to question the very job interview we are currently having? How is this relevant to your prospective job? Current interview not up to par for you?".

Recruiter made me read through the slide deck. He called me the second-time and 'pop quiz'ed me on the contents of deck.

What a strange company.

A reason for that might be because if they tell you straightforward, then it gives candidates a chance to "fake it" just for the job when they might not be the best candidate.

It's going to depend a lot on the individual interviewer how well they can answer that question. If recruiting and the hiring manager don't both have good answers to that question, though, that's a big red flag.