I think average Americans do care, especially older ones who have a better understanding of the thinking led to America's founding. That understanding is that

I think average Americans do care, especially older ones who have a better understanding of the thinking led to America's founding. That understanding is that those in power always try to get more power, so our system of government was set up to prevent any person or subset from getting too much power, through balance. The ability to spy on anyone's current and past internet activity and past phone calls is an impressive power. One could hope it would be used responsibly and not abused, but those with a good understanding of the founding of the country would recognize this as too great a power for any group within the government. Even if it isn't being abused now, the risk it will be in the future is too great.