Secondly, if you account for "productivity" hours instead of "waking" hours. You spend more of your "productive" capable hours in your life working, by a large margin.
Or maybe I was just born with a lazy brain /shrug.
Assuming 8 hours a day you're spending 1/3 of your work week with these people. It doesn't have to be a social bonanza every day but if you dislike making smalltalk with these people, or are actively disdainful of their chatting and web surfing then maybe you should change jobs. Cuz it sounds like you're spending a lot of time around people you straight up don't like.
It can of course go higher when you have a specific goal and you're running on adrenaline or are truly enraptured by what you are working on. But a typical 8 hour day is often packed with chitchat, meetings, administrative busywork and so on to help pad out those hours.
I did work one place that stressed to us to allocate no more than 5.5 hours of work-work a day when estimating jobs due to the above, and it seemed roughly accurate.
Sometimes I get more done in 15mins of my personal projects before work than a day of work, due to meetings or being blocked. Companies are usually not nearly as efficient as they could be.
I think 90% of work gets done in the first four hours for me.