So... what if a news article links to a toot or Lemmy post? They're most likely to link to the instance that the post was submitted from, and most people aren't going to understand that they have to go search for the post from their home instance if they want to like, vote, reply, or retoot. Email made sense to people because it is basically all direct messaging, but public linking from articles and such is going to be difficult.

I didn't knew that, not everyone is an expert. For example, my Google account world with "google.com" and "google.fr" with the same login info.