What happens is it's your picture perfect textbook mix of retard, hipster, and poor person who thinks they are being ironic but also "green" and that they are better than you with juuust the right amount of positive benefits like, you get a lot of exercise. Cyclists are like people with a fake self diagnosed brain disease who didn't want to pretend to be retarded their whole lives, so they found cycling instead. Virtually anyone can just become a cyclist overnight. It's your classic example of doing something stupid just so you can pretend you are different and go "Heh, I'm way better than all those car normies" or "cagers" as they like to call them. If you ever hear one say "cagers" it means they only got into the bicycle to piss everyone off.
What is the worst for cyclists is that certain laws help them feel like they are entitled snowflakes who own the road. Two examples are this. First most states in the USA have laws explicitly allowing motorcycles and bicyclists to legally go in the gap between cars if they are all stopped at a red light and then be at the front. This makes them think everyone is letting them bypass them and get to "first place" like everything is a race. This is suicide because cars choose to dart between lanes and nobody thinks to even check there. Second, most states that have magnetic sensors in the road to switch lights from red to green and only work that way and not on a timer, have an exception that if you are on a motorcycle or bicycle because they are not heavy enough to set off the sensor and change the light so it will never change, you can just check and make sure nobody is coming and go through a red light. After a few hundred times of this your average bicycle dipshit won't really check anymore because they think they own the road, and unlike on a motorcycle, if you see someone was actually coming you can't hit the gas to give yourself more time. You are on a bicycle.
There's just all these little small random benefits and little laws on tiny random things that make it impossible for them to see how stupid it is. If you live in a big city, but one that is not yet big enough for good/cheap public transport, and parking sucks, and the distance to work from home is a few miles, then it is acceptable. Literally every other case of bicycling on the road is for attention horny faggots who just want to have the same casual fights with "car normies" about how superior they are.