> People aren’t walking in malls because of car culture. Usually they walk in malls because it’s too damn hot/cold outside.
People (most) are walking in malls entirely due to car culture. No one where I live in Chicago is going to the mall to walk - because they walk every day just by default to get things done.
When you use a car to go literally everywhere, you don't have that exercise baked in. It's difficult to commute here and walk less than a mile a day, usually much more. When I lived in the suburbs this might be measured in hundreds of feet.
Very few people go walking for the sake of it, regardless of location or weather. If you're not walking on a daily basis simply for practical reasons - odds are you don't walk regularly at all.
The rest is subjective - but I highly prefer "pleasure walks" in the city as well. After a month or two in the suburbs you've seen literally everything there is to see within a 1 mile radius of your home, and it almost never changes. A living city is a much different experience, and it's rare a walk won't result in some novel discovery or meeting a neighbor. This personally motivates me walking new routes far more than the endless sterile lawns in the suburbs.
Not to mention how insanely anti-pedestrian many suburban populations are - you will absolutely be harassed unless you are on designated walking trails in my experience. I did live in one inner-ring suburb that was a far better experience, but I feel most here would consider that to be light urban vs. suburban.