Because we're talking about the people we know day to day, not a bunch of people who are interested in installing obscure apps. Last time I tried chatsecure a f

Because we're talking about the people we know day to day, not a bunch of people who are interested in installing obscure apps. Last time I tried chatsecure a few months ago it was buggy and difficult to find a server to sign up to that supported the bizarrely difficult to navigate XMPP extensions that allow you maybe sort of know if it's all working properly. So yes maybe for ultra secure comms with specific parties, but useless as a day-to-day solution.