[eli]

simply not a practical option for everyone. I only do it because I can bikeshare one way home. After biking a few miles in DC in the summer I need a shower and complete change of clothes.

Also, before they put the bike lanes in biking during rush hour felt stressful and dangerous.

[Poiesis]

I hear you; a lot of people feel the same way (I'm lucky enough to be able to shower at each end; if I don't bike commute it's usually more laziness).

That said, a lot of people seem to sweat less on bikes with an electric assist; people worried about sweat might look into those as an alternative.