I prefer open plan setups and am glad that working in trading environments has ensured my career has been spent in them, so my natural reaction to the title here is "erm, not all of them do". I actively enjoy being interrupted to discuss something unrelated to my current task, and often return to that task with a fresh insight afterwards. I enjoy helping my colleagues with things, and doing so helps me build a positive reputation in a way that has helped my career. I enjoy camaraderie and conversations about my colleagues' lives outside work. I would refuse a job in an enclosed office or cubicle unless there were very strong compensating factors.
I don't require others to feel the same way, and I don't think people are wrong or bad if they prefer greater separation from colleagues. Humans are diverse. However, someone who views their colleages, their work-related questions and their attempts at broader conversation with active disdain is unlikely to be someone I want to work with.