I have another data point. A dear friend died last month, after about two weeks in hospice. She had no children, but she did live in a large cohousing community. We did our best to manage visitors, but sometimes there were 5-10 people waiting to spend time with her. Which stressed the staff, and annoyed other residents.
Quite right, but living in any community involves making compromises along with the benefits. I think the bottom line is community is an achievement that takes effort and compromise to attain.
So anyway, children aren't the only path.