You need your hands to ride a motorcycle. Here are the biggest reasons to wear motorcycle gloves:
1- Reduce injury when you fall. It can happen to anyone at any time, and the first thing you do is instinctively throw your hand out to stop your head from hitting the road. The result is horribly scraped up hands which need to heal before you can ride again.
2- Guard your hands against sun, debris and rain. Sunburn, scratches from sand blasting your skin and moisture between your fingers are all really annoying distractions from the joy of riding.