In your first paragraph, you seem to assert that this program is as The Guardian reported (that is - essentially unfettered access to private data stored with tech companies). In your second paragraph, you seem to admit that we don't really know and there is more to be resolved.

Ultimately, I think you are talking past the person you are replying to. You are arguing that the program as reported by The Guardian (essentially unfettered access to personal data stored with tech companies) is horrible. He is arguing that the program is not what it is being made out to be, and the differences between what it is now popularly believed to be and what it is are tremendous. That is a more fundamental argument that would make the other argument moot if it is true.

See: https://medium.com/prism-truth/82a1791c94d3