It feels like... victory.
Seriously though, with cycling, if you're into technology and engineering, you appreciate the bicycle for its unparalleled mechanical efficiency. If you're attuned to environmental issues, it allows you to be part of the environmental solution and not part of the problem. If you're into economics and politics, it keeps your hard-earned money in your pockets rather than wasting it on corporate welfare or sending it overseas to folks who might not have your best interests at heart. If you're into health and fitness, bicycles give you a great workout. Also, with a bicycle, you get a sense of freedom and accomplishment in getting places using your own power rather than being dependent on gasoline to do it for you.
All of these things make a cyclist feel good about being a cyclist. Motorists, who drive inefficient machines, who are part of the environmental problem, who send their money to rich corporations and foreign powers, who get no exercise from driving, and who are dependent on gasoline, get none of that good feeling.
Clearly, David has never commuted by bike in his life. He appears to be totally unaware of the advantages of cycling and seems quite scared of the prospect.