Earlier quoted context omitted.
I agree with you. However it won't solve the problem of privacy regarding Facebook. Other issue that I see here, people want an unified messenger, with a great user experience, 100% secure, open-source, multi-platform, free (as in beer) and no monetization included. I'm sometimes shocked that here - hacker news - people underestimate the price of good software development, infrastructure and maintenance.
Even a tiny amount of monetization should pay for development of a chat app... Imagine you build it with a team of 5 software devs for each of linux, mac, windows, android, ios, web. You build it in Europe paying a generous salary of $80k. You need 1 server per million users (as whatsapp did pre-acquisition), hosted on say AWS. If you get 10% of the world to use it, the total running costs are 1.2 cents per user per…
Optimistic and dangerous. You will need at least a visionary person like Moxy willing to dedicate his/her life to the project. You need a master mind to get all the security architecture right. BTW You will need an operation team and multiple servers to make sure that everything runs stable. Just look the costs for running COVID-19 apps. Development and operation. Million of Euros. You can expect similar costs to run a service able to compete with WhatsApp.