A lot of disingenuous Lemmy users in that thread pretending that picking a server is more confusing than filing your taxes. I think join-lemmy should probably hot-list like 6 or 7 servers instead of making you choose via a primary interest, since you can migrate your account later anyway. But I am personally not tech oriented and managed to make an account and find an app without an issue.
The goal was never to convince people who don't know how email works to join, it's to convince an average reddit user to join.