Man! I don't know if you agree or not with taking care of the environment, but come on, having a bike would help reduce the effect we have on environmental pollution, plus it brings many health benefits. For example, it helps the heart a lot, so it decreases the risks of heart attacks (1st benefit); pedaling oxygenates the brain, something useful for those of us who need to think a lot (2nd benefit); the typical, it helps to strengthen muscles and have more physical endurance (3rd benefit).
And yes! Take a look at this young man's work, he has some good pictures, especially of insects.
Yes, not just transport but a physical exercise also, and lessens carbon emissions. Many benefits for sure.