That is true, but so many movies have already have been made about the Titanic that they went with the made-up story. I thought the love story, and the drawing, and Billy Zane's melodrama villain were stupid, but a story about the real adults and families on the ship wouldn't have brought the teens who made up so much of the audience into the theaters.
It should have been a better made-up story, then, instead of a story about a couple of unlikable people doing things that made little sense. Just MO. Well, I’m sure the picture made lots of money, so that’s all that matters.