It's not "basic technology". It's easy to find somewhere to get an email account, but you're not going to find a Lemmy instance on Facebook or in an advert or at work. And Email doesn't usually say "we don't like that instance anymore so you won't get any more messages from there, so you have to sign up to something else" (see Beehaw).

The problem is y'all are tech savvy and have no idea what it's like to not be tech savvy. Hell, my wife is a goddamn computer scientist and can't handle this stuff.