That’s not what it means. I suspect you’re reacting to the headline without reading the article. It’s not making a moral statement about arms sales. It’s saying that countries are realizing that they face potential legal exposure for continuing those sales/transfers. That’s why it’s risky. No one knows if they’ll actually face those consequences so, in that context, there’s a “chance it’s alright.” Legally – not ethically or morally.
The Leahy Laws are another example of that – they’re frequently criticized for being selectively enforced. The Leahy Laws put Israel aid at risk but it’s not a sure thing, regardless of the moral implications. At the end of the day, if the US believes or chooses to believe that they don’t apply, they probably won’t.