South East Asia is warm. I simply cannot feel safe driving a scooter with a few centimeters of winter ice on the roads. And I'd have to buy even more winter clothes: Wind chills are a thing. (I live in Norway. It snows, more so when you get inland)
And as far as e-bikes: They can have storage, quite a bit of it - just like a regular bike. You just have to get the right model or accessories. People use them with a trailer for their children, too, and there are at least a few around here that are used for goods. People locally use them all the time for groceries and stuff - you just go to the store more often. You can take the batteries inside to charge them: Of course you can swap them out most of the time. If you don't have places to park, that means your city doesn't have bike racks and other such things. A few places here have bike lockers that allow you to keep your bike out of the weather, too.