I use an analogy whenever such an argument is used against me:
It is not about secrecy, it is about privacy. Consider what you do on the bathroom. Whatever you do there is almost never a secret, but it is private. If you close the door of your bathroom when you use it, you know the difference of secrecy and privacy.
Also you have to consider other people like activists who need privacy for many reasons include their own safety. When you ignore privacy right you are giving incentives for companies not to respect it. But people who use this right benefits everybody, even the ones who don't care about privacy.
Ignoring privacy because you don't need it is like saying free speech is not important because you have nothing to say.
It is important even if you don't care about it because the people who use this right will benefit you and everybody else.
