That depends on the problem. I wouldn't want 5 different developers to write 5 different solutions to the same problem only to have 4 of them rejected in a code review because they should have used the first dev's solution, so if someone has an problem they need to solve with code it's far better to talk about it first. Obviously this only really applies if you work on moderately complicated projects in medium-sized to large teams though. If you work on smaller projects you can know the whole codebase so it doesn't really apply.

More generally, I'd hate to work in an office where I have to be wary of interrupting the people. That sort of environment is toxic to working in a team. I encourage developers who want to work in a quiet place without being bothered to go somewhere outside of the main office.