I didn't read their comment as a problem to be solved in the slightest. The great thing about living in the city is that one can also walk 5 min to their gym, then see people they might know from the gym on their way to the grocery store, and occasionally invite them to a drink within walking distance to their home if they want.
Or alternatively you can get on your bike and go wherever you want too, like many city people also do.
Living near options doesn't mean you're constantly engaging in those options, but if you are engaging in those too much, ya maybe move a bit further away.
Problem with many suburbs is that they're basically only a place to live in isolation, with a few exceptions. You see maybe a few scant people who walk their dog, everyone else is either at work, inside, in their backyard, or they've driven somewhere else.