Sometime around 2010 or 2011, I created a second and completely separate account with my work email address because I needed a developer account for work related tasks and I did not want to use my personal Facebook account for it. Within 24 hours the new work related account was removed and my personal account was suspended for 30 days for breaking Facebook's terms (no duplicate accounts).
I stopped using Facebook for awhile, but decided to give it a try again (FOMO) a year or few later. Tried logging in, and they pulled this "send us state issued ID" crap, and I haven't been back since.
On the other hand, my dad creates a new Facebook account every time he gets a new device. He even uses multiple different accounts at the same time. He's never been forced to provide them with a copy of his ID nor has he ever been suspended for using/having multiple accounts.
Seems like they're super arbitrary with the rules and although I'm better off without Facebook, it's mildly annoying.
If I were to guess, your dad uses mobile devices with an app and you used a web browser? We're second class citizens now for not using the corporate-approved tracking device