In most of the US, enough parts of the ear are too snowy, too rainy, or too hot for biking that relying on a bike as a primary method of commuting is non-viable

In most of the US, enough parts of the ear are too snowy, too rainy, or too hot for biking that relying on a bike as a primary method of commuting is non-viable; you need a car or nearby public transportation. And since you need to have a car or nearby public transportation anyway - there's not much incentive to bike at all.