I don't quite understand why people say that a Windows OS lacks in privacy compared to Linux. I think it has something to do with being closed-source, which means developers can put privacy-compromising backdoors into the source code without you knowing. On the other hand, an open-source OS cannot hide privacy-compromising backdoors in its source code. Is that why a closed-source OS is generally considered to have worse privacy features than an open-source OS? Please explain in lay-man terms, because I'm no security expert.