And you want utmost security for your body, which is why you go to the doctor instead of self threat. And also doctors go to other doctors when they are ill.

The sad reality is that things are complex and you probably get suboptimal results trying to do everything yourself, what other spend their lives trying to accomplish the same.

WhatsApp scaled to 1B users with only 50 engineers, but there were 50 people working full time to provide what people think they can provide in their spare time?

Also as the other end of any communication is quite scaring thinking I am communicating securely with someone, but then finding out that their server is compromised because of an out of date library or service.