Isolation

Do you like being alone?

"Of course not. Who does? I had company everywhere I went; being a lone would have driven me crazy." 

In "The Sound of a Voice" Hanako, the woman, constantly took in visitors only for them to leave her alone for long stretches of time until the next visitor arrived. 

"How long would she have to wait" 

It doesn't say, but what I do know is that human interaction is vital to keep your sanity. You can see or learn as much as you want, but, without someone to share it with, what is it really worth? Whether we want to admit it or not, we need each other. 

"I think I could do just fine without you. In fact, I'm a pretty hot commodity" 

Well that's great to hear, I think? What I'm trying to say is that there's a reason there was Adam AND Eve. No matter if we're committing sins or good deeds, we need someone to share it with to really make our life worthwhile. Life isn't defined by the amount of money we make or the amount of degrees we have hanging on our wall; we're defined by the people we surround ourselves with and the good times that we can share. I think that's what drove Hanako mad; she had nobody to turn to, she had nobody to love or be loved by. All she wanted was the sound of a voice.

Besides, being awkward wouldn't be as much fun if you're being awkward alone