I think it’s important not to go down the rabbit hole of picking either the thesis or the research apart. This is an undergrad project, without funding, using research available to the author from the internet, with or without intimate knowledge of either liveaboard operations or commercial shipping.
The dude came up with a thesis, developed a thesis statement, wrote 50 or so pages, and probably successfully defended it to his major professor who likely doesn’t know anything about either diving liveaboards or commercial shipping either. It wasn’t funded nor did he spend 4 years working on it. Cut the dude a little slack.
It’s an interesting read, and only draws attention to the fact that liveaboard operators on the whole are loath to share their passenger misfortunes.