I've never been in a situation where I was working and people around would all the time interrupt me and ask for my opinion for everything everyday. And I've worked in big open floorplans. So I would not say it is always the latter here.
Consider yourself very, very lucky. I'm lucky if I get 20 minutes of solid thinking time at my desk. I'm also an architect on a 60 person project, so it may just be different for me.