I fully agree with you. Not just about needing communes for the society structure, but also for the culture and mindset of community and mutual well being.

I think the closest most people tend to get to living in a tribe/walkable community is living in college dorms. And that actually worked out really well for me for the most part. The critical thing for me was having my own space to myself to retreat to that is clean to my standards. It's in slight contradiction to the anarchist philosophy I'd like to see humanity move towards.