That's kinda why I don't mind there being some onboarding friction with Mastodon/Fediverse... If you can't immediately wrap your head around the idea of @user@domain, you have a home domain and thay different domains can talk...
Maybe learn how to use a fucking computer before you come here.
Technical gatekeeping is best, you can't just market and/or shame it away. Either people understand the basic concepts, or they can't use it and they fuck off back to plebbit or tiktok.