Earlier quoted context omitted.
I also want utmost security for my money, which is why I put it in a bank rather than holding the cash myself.
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…
Server getting compromised - that's largely unimportant with end-to-end encryption through OMEMO. Distros also apply security patches (just keep things up to date).
You do not require 50 engineers to run a chat server for Here's a guide on how to install everything needed onto a raspberry pi: https://samhobbs.co.uk/2016/09/installing-prosody-instant-me...
As with anything else, it's a fun learning experience and something new to try.