I would prefer that infrastructure in the U.S. were more dense, that less people were not required to drive everywhere. But the reality is that, as life in many parts of the U.S. is currently set up, people cannot rely on bicycling as a safe, efficient, and effective means of transportation in their daily lives. Biking, if you live in a place that supports it, is good, but telling people to "just bike" remains a useless and naive plan for addressing climate change. Your energy will be better spent elsewhere.