I don't think he's wrong about it. I mean, if you walk into traffic, you know exactly what you're doing, even if you think you are safe. You're asking to be hit. There's the 50% of what you put into an event, and there's 50% out of your control. If you willingly put yourself in a situation where you've been exploited before, you're in a sense "asking for it". It's colloquial, meaning the person didn't do the planning or think things through. Personally I believe that people who are unprepared for the worst are simply asking for it. And it's not a bad thing because negative consequences are big learning experiences. Now if you keep repeating the same mistakes and getting involved with abusive people or making yourself submissive all the time, then there's a problem.

But in general, he's right. Doesn't matter if the person is an angel. If you get something easy, you don't treat it well. You get bored and go after something harder. This is a fact of human nature.