I thought the Titanic disaster was pretty well-explained as an accident caused by incompetence and hubris. The ship wasn't "unsinkable"; they just advertised it that way, but it was no match for a big iceberg. The ship was sailing through an area with icebergs, and going fast too, and it was nighttime. IIRC, the captain was in a rush to get to the destination (sorry, it's been a while since I watched Cameron's movie). Really, all it took was the decision to go full-speed through an area with icebergs at night to cause that disaster. Then other stuff afterwards was sheer incompetence and classism, like not fully filling the lifeboats.
Assassinating one person by sinking a whole ship is a pretty crazy way to kill someone; it's surely far easier to just hire someone to club him when he's walking the street somewhere. However, with Epstein, there's no such similarity: he was the only one to die, and since he was locked up in prison, anyone wanting to kill him really didn't have much choice, if they wanted to get him before he testified against someone. And there do seem to be a disturbing number of things that went "wrong" for this to happen.