Agreed. Her family last spoke to her at shortly before 4am, and she was reported missing at 6am. That's just a two hour window for her abduction from her cabin with her family right there.
What's more likely, that a drunk woman who'd been partying till 3.30am accidentally fell overboard (leaned over the rail to vomit, or was just playing around and slipped).
Or white slavers somehow managed to sneak onto a ship, enter a cabin without anyone seeing them, overpower a healthy adult, drag her away unseen, and somehow manage to get her off the boat, all within two hours and without being seen or leaving a tiny jot of evidence that anyone else was in the cabin.
Honestly the whole sex trafficking thing is the modern day version of Satanic Panic and it's so, so dangerous, since it detracts attention from real trafficking.
The vast majority of trafficking is labour trafficking, not sex trafficking. (This even applies to children, btw - most children who are trafficked are not trafficked for sex.) Trafficking works via grooming, intimidation, and they target vulnerable people who won't be missed such as people from developing countries, homeless people and girls in care with no one looking out for them. Basically people no one cares about. And people who are trafficked aren't locked up and chained to beds screaming - they walk around and run errands just like anyone else. The person sitting next to you on a bus might have been trafficked. The girl who does your nails might be trafficked.
The idea that there are sex traffickers lurking waiting to pounce on middle class white British/American women and drag them away kicking and screaming for a life of forced violent prostitution is sheer fantasy and it's really dangerous since it hurts actual trafficking victims.