> You don't actually say why they shouldn't be doing this, though.

It weakens the US position in the world, how many people are going to be thinking today "Hm, I have really sensitive information on my phone, the US can hack Iphones and Androids? Maybe I need a different phone."

There is a risk due to the US intel agencies having so much power over US technology that other countries will end up shying away from US tech.