I asked for a person without a Lemmy account to install Voyager and make some screenshots. So, here's what my experience was like, and apparently that of others as well. I hope it helps understand in which way the average user is an idiot :) Here goes:
First, I launch the program. This is the screen I get:
So, I've already got an account, so I don't need to join Lemmy. Therefore, I choose the other option, "Pick another server", in order to tell which server my user account is on, and log in to that server.
Then I'm in this screen:
I choose Sopuli and all I get is a form for creating a new username. But why would I want to create a new one? I tried long-pressing the sopuli.xyz text, and got nothing.
Obviously, in the first screen there is the "Log in" button, but because there was "Join" and "The other option", I had assumed the "other option" must include the login. The text can be interpreted that way as well.
And, at the point when I was already at the list of Lemmy servers, the "Log in" option was nowhere to see, and I didn't come up with the idea of going back to the first screen, because I assumed I had already seen both of the buttons there, and I was sure I had pressed the button that was not "Join lemm.ee".
Then I gave up. Some days later I accidentally launched the program again when I was supposed to do something completely different on my phone. Oops. But, the good thing was, I got to that first screen again. And I double-checked that I'm indeed pressing the "Pick another server" button in order to log in with my pre-existing username, and then I noticed the Log In text that is not a button. And pressed it and found out that yes, Voyager does actually support using pre-existing usernames! And nowadays I'm using Lemmy.
Now I've heard of a few people who have installed Lemmy and all of them have first given up, and then tried again after I've told them to "look for the hidden Log In button in the first screen".
"Log in" is what most people will want to do, so people will assume that it will be one of the most prominent buttons. There can be reasons not to make it more prominent than it is; in that case the next screen, with the list of servers, could have a button for "Actually, what I want to do is log in with a username I already have!"
What do you mean with this "As Russia keeps advancing"? It has not advanced since February 2022. The conversation is a bit difficult when the foundations of the conversation are so uneven. You talk about "Russia advancing", and to my knowledge, that has not happened. Could you please elaborate?