I now where this is going in socialist and Marxist communist minds, leery be clear about what a "right" is.
You have the unalienable right to choose apps, protocols and platforms that interoperate using one login.
You don't have a right to force apps, protocols or platforms to do this.
It is not a right if you have to force someone else's platform to allow cross platform ability.
Privacy is an unalienable right that is constantly being egregiously infringed on by governments and institutions.