I agree with this sentiment. However, I think it's important to not dismiss clues that are potentially the key to finding her. For example, it seems factual she read that wikihow about how to disappear. It's not crazy to think that she'd follow some of the advice in that article and therefore help in potentially determining if that's the case.
I don't even think it's about victim or not a victim at this point, it's about finding her regardless as she's missing. But if she was looking to disappear, there's a different logic you need to be aware of in regards to that possibility. I think it's logical to expect that if you would find someone quicker if that was the case, if you actually acknowledged it was a plausible scenario. Finding her quickly as possible, is the goal. Im sure the police aren't ruling it out as plausible scenario either.
Scratches on the bf's face are a red flag too. When people want to disappear, there is typically a reason for that. I'd venture to say that in many cases it's a significant other you are trying to escape from. So the reason as to why she potentially was contemplating disappearing is worth trying to decipher. That could come from a friend... social media... a journal...
The same reason might also be relevant to a motive of someone in regards to harming her.