I just explain but starting how you can email gmail from Outlook and such ( familiar concept). Then tell them you could email a Facebook account using username@facebook.com (this shows they were open to it at some point), that it was a default state of things because they wanted you connected. But then they realized they can make you sign up to their own website and make more money, so now we need account for everything. But imagine you didn’t, you could access different contents in the UI/format you want. You don’t need to share screenshots of different social media (shows why it’s useful), you could just follow different people from different websites.

So far this explanation has worked. I haven’t converted anyone, but they understand. Sometimes they try to install and see, then say “the things I want are not here” because we don’t have all the niche