Most of the people who want to sign up for Lemmy are already here. They are technically oriented and don't mind dealing with the quirks of Federated platforms.

The commenter's concerns are valid. For a "normie" who's only used traditional social media, the Fediverse seems like a train wreck. I enjoy the Fediverse because I like figuring out new things and learning new stuff. Normies don't have time for that.

tl/dr: The average person will be very reluctant to use Lemmy.