Fenders are probably the most underated bicycle accessories. Not many cyclist consider this gadget as important as others. Maybe some cyclist are trying to reduce the weight of their bike by minimizing its accesories.
Nevertheless, as a touring cyclist, fenders are meant to protect our bike & our clothing from dirt when riding on wet roads. It is so convenient to simply riding throught puddle of water rather than avoiding it especially when riding at fast speed or in the rain.