Then sue Apple, I'm fed up with people finding things to have a go about. It's the same material as the 6s, be it sapphire or not, I've never heard anyone complain about a scratched lens cover before.
You haven't heard of anyone complaining about a scratched lens cover before BECAUSE THEY USED SAPPHIRE. Now that it appears Apple isn't using sapphire, or a less scratch-resistant version of it, the complaints will start. Only time will tell...