That's true. However, if you don't have sex outside marriage, the odds of many of your negative outcomes drop to nearly nothing. Perhaps even statistically zero, although not "effectively" zero, since there's always at least one anecdote.
If you don't have sex, you're not going to get the woman pregnant. If she becomes pregnant anyway, you know it's not your child, and you can disclaim paternity (and prove non-paternity, if necessary) immediately. Many of the child-suppport cases involving non-fathers have turned on the statute of limitations.
If you don't have sex with a woman, the chance of her charging you with rape is mighty small, and the chance of a charge making it to prosecution is even smaller. (I suspect the young man in the article left DNA behind, even if he says he didn't complete the act, as it were.)
Yes, the worst, unlikely outcome is a possibility in any relationship ... but you can choose to live in fear of that, or you can choose not to.