Oslo is #18 on that list, not too shabby. Kathmandu is in a valley.
People act like I'm some kind of freak when I arrive at work on my bike in the middle of the winter. But I remind them that there are people who work all day outdoors in places like Alaska and Canada, and 20 minutes on a bike doesn't even come close.
Now, I do have the luxury of flexible hours at my workplace, but (for instance) my daughter doesn't, and she manages just fine.
On the way said "only three more mountains to go till we're home"! I asked "WTF?" and he explained that's what they call the bridges over the canals.
This is one of the intersections we went through right after one of the mountains, showing how much the local culture affects the traffic safety and bicycle friendliness as much as the geography: