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Some of us live in cities where it rains pretty frequently. Today would be lovely on a bike. Yesterday in the rain - not so much.
Netherlands is a really rainy country. Still, bikes are extremely popular, like the average is 2 bikes per person. The typical commute scheme is (1) bike to the station, then (2) train (trains are good, really good), then (3) another bike to work.
I've got a pair of those and they are really convenient: I can put them on quickly, even while wearing shoes, and my legs don't get as sweaty because the rainmates are open in the rear side.