I'm pretty sure I put in about 3-4 hours of real work when I was in office too. If you count meetings, answering emails, and operational work, it is hard to put in a standard 8 hours of real work. Also, the comment that the Amazon employee made is similar to what I hear across other online forums such as Reddit and Twitter. Seems Amazon has created a really toxic environment for everyone involved.
Playing ping pong and taking 3rd lunch and faffing on HN are not working.