How much btc do you have? Can you share your xpub? No problem right, you're not a criminal. To answer, bc I don't like to be under surveillance, why should Google track me and read my emails? It's bad for a company to monitor their users, they should respect the users. So it's the same reason why I use privacy respecting tools, not bc I am a criminal but because there is no reason to spy on me. Coinjoin helps break the Metadata, if there was a larger bitcoin economy surveillance would be harder.