Far too many romantic writters (as in, actual XIX cent. Romanticism) idealised the death by drowning because the often decievingly peaceful appeareance of the (wound-less) bodies once found, when in reality it's quite the hard way to go. As sad as the tale is, it's surprisingly refreshing to see the mangaka avoided that trope and warned about it.
Its weird, always wondered why it was even romanticized in the first place, even now it still is romanticized by alot of people, slowly suffocating to death in the cold dark water while desperately trying to get out of there sounds like a really shitty way to go.