Tracks are inherently safer, because they are a more controlled environment. There are fewer surprises, and if something does happen there are corner workers that will let you know. One of the biggest differences on a track is that tires come up to their working, sticky temperature (particularly with very high performance DOT approved tires) and stay there. You'll have a more consistent amount of traction under braking, cornering and exiting corners. It makes going quick less stressful and more enjoyable. Now if you try to go from off the trailer to new lap record, you have a good chance of balling it up pretty quickly. Not being a nanny, but have years of street and track experience.