How do I change the login screen of Big Sur via Terminal?

Considering that there are plenty of evidence that Apple doesn't always cater to the best self-interests of the consumers, I'm not sure how much I can really trust Apple. By the way, this is coming from someone who is a fairly loyal Apple fan. It would take A LOT, and I mean A LOT for me to ditch Apple, but it's certainly possible.

I think Apple is mostly good, a lot of their ideas are home runs, absolutely, but a lot of their ideas are also just user-unfriendly to put it lightly.

As of right now, I can't think of a good reason for them to deny users from changing the log-in default screen.

Maybe it's an obnoxious branding tactic, but I mean all Apple hardware has a highly visible Apple logo already, so this tactic would be redundant.

But all of that doesn't matter.

What matters is a solution to this problem.

I'm hoping someone out there can help. (You'll be forever my hero.)

OK it never occurred to me that this could be a solution to a security problem.

I have been enlightened.

Thank you.

I think I can let this problem go if it's serving a useful purpose.

I just tested it and it works. Thank you so much!