Why would spend a few dollars on a case to cover a phone that costs hundreds anyway??
if you had a Ferrari F430 would you spend a few hundred on a cover for the whole car to "protect it"??
If you were smart you would buy a good quality car cover for your Ferrari to protect it while you were not using it. Thats why I use a case. Not only do I think its a convienant way to carry it it also protects it while I'm not using it. I very rarely use it while its in the case it stays in its case protected until I need it then I take it out.