Many people live alone and are quite content to do so, especially creatives. Their minds never stop, they are doing and doing (sometimes at non-conventionlal hours). Sometimes the people around them may not get the attention they need if they’re in the same space. I’m getting side-tracked.
What the title suggests is that creatives should not isolate themselves so much that they cease taking in new ideas and information. Thus put in new input and your output will benefit.