But other people don't install element alongside whatever (except maybe your parents), but they continue using what works for them... Are you really so "special", you can convince all of your friends with "I know all your friends are using app X, but if you want to chat with me, you need app Y, which noone else is using right now, but maybe, some day..."?
Not all, but the ones that mattered and bothered, yes.
I am not asking them to delete the other app, I am not asking them to join a religion. I am just asking them (and helping if necessary) to install an app and set up an account on my server.