Verizon's screen protectors, at least for all of the Droids I've had, are always like that. Never made any sense to me. I usually don't buy them, but this time around I went ahead and got a pack to tide me over until some better ones are released.
Gorilla Glass is great for preventing scratches, but I like a good screen protector because of all of the various gunk that build up on the screen.
Some of that stuff (particularly makeup and hair products that might be left behind by a female friend...or male friend) can really be difficult to remove if it's left there for any extended period of time. Even with Gorilla Glass, scratching is possible when really using some elbow grease to remove certain substances. A screen protector makes that a lot easier because it can just be replaced. I also buy, use, and sell off phones with great regularity, so I'm always cautious to take the best care of the phone possible to retain a high resale value. Being able to say you've always used a screen protector goes a long way in a sale.