I agree with this, and I think we're partly conditioned to think this way. We (think we) can change ourselves, but we (believe we) can't change the world. I think it's OK to think bigger.

To make friends, people need a place to meet, to have time and means to be there, and a reason to go there semi-regularly. A lot of the design of society completely ignores these needs. These are solvable problems.