In the US, bikes are basically considered toys. If you're a kid, you ride one on your sidewalk to enjoy a sunny Saturday afternoon. If you're an adult, you buy one that costs $3000 to impress your friends. You put it on the back of your car, drive it to a fun location, and pedal around for a few hours once a month. It's
way too dangerous to even consider thinking about maybe possibly riding it to work or something, because cars are out there with the intent to murder you as efficiently as possible.
Incidentally, I ignore all this and bike to work every day, bike to stores when I go shopping, do all my grocery shopping with my bike, and of course go on long rides for no reason other than that it's enjoyable. Yeah, there are people who will give you mean stares at traffic lights, or engage you in discussion about how dangerous it is and how annoying you are to them. They also seem to enjoy demonstrating the loudness of their horn... which do end up being quite loud.
But what's good about the Internet is that it's allowed me to grow a very thick skin. I can deal with the yelling. I can position myself in a lane position that keeps me safe but slows down one or two drivers. It's hard, but I can do it, and I enjoy cycling a lot (and don't think drivers are bad). But most people don't have the self-confidence that I do, get yelled at, and never ride their bike to work again. Cars aren't ruining the environment, drivers are.
Incidentally, my second-biggest complaint is that it's hard to buy bikes that are set up for what people need them for. I had to buy my own chainguard (from Germany), rack (from Germany), and dynamo hub (from Germany), just because nobody in the US sells any products that are any good. Heaven forbid someone buy a bicycle that could carry a load and wouldn't ruin their clothes.
I love working on my bike and tinkering with things... but most people don't. So they just buy a car, honk at the cyclists that are increasing their commute time by five seconds, and keep the cycle of fear, uncertainty, and doubt alive.