This doesn't strike me as a very compelling response.
If someone is arguing for dragnet surveillance with the idea that it only really impacts the guilty, and you respond by pointing out that you're innocent so there's nothing to gain by surveilling you, you haven't refuted their position at all.
But if someone is Okay with a dragnet approach to find criminals, it also means that they are Okay with the government knowing every little detail of their life.
And I would assume most people have things they would rather other people or government not know about.
If someone is arguing for dragnet surveillance with the idea that it only really impacts the guilty, and you respond by pointing out that you're innocent so there's nothing to gain by surveilling you, you haven't refuted their position at all.
edit I see we're retreading an exchange (between others) from a few months back: https://news.ycombinator.com/item?id=23709602