There usually aren't any meaningful destinations (like shops / a park / a mall) within a suburb you can reach in a reasonable amount of time, except a friend if the live close.
Go play SimCity again. The concept of mixed-use doesn't exist because it's built by an American.
Commercial zones that have groceries, restaurants, shops, and entertainment are almost always several kilometers away. You could technically bike there, but there are rarely bike lanes. And due to serving the needs of a large, low-density area, you’d have to bike on multi-lane high-speed thoroughfares which is far less safe than being able to use small local streets. Where there are sidewalks, they often end abruptly and don’t actually connect to anywhere or anything.
It is truly hell.
My (American) definition of suburbia primarily involves a lack of sidewalks.