So.... you invite somebody. Then maybe a dozen people in your FC invite somebody, then the people who were invited invite somebody....
Do you see how this can snowball out of control? I do feel your frustration since I had a friend wanting to join the game just before Shadowbringers launched and with not just my world, but my entire data center being congested, I had to tell him if he joined now there was no way he and I could play together. Whining about having to use world visit to play with your friends is, frankly, a luxury I'm sure the rest of us on Aether would like to have.