Social interaction is important in any society, be it physical or online. By doing so, you get to feel among - a sense of belonging. Isolating oneself is equal to depression,because when you see others interacting, you feel left out and begin to wonder what is wrong with you and this drains your mental strength.
So I don't think it requires a debate. The answer here is obvious - social interaction is essential.
Thanks for sharing your thoughts, and yes, for me its indeed obvious :)