Earlier quoted context omitted.
This is a dangerous headline because it implies that Signal was broken, which could lead to people moving to LESS SECURE SERVICES because they think the more secure one is broken. When in reality is the phone and OS. They have similar end result for the phone in question, but headlines like this can lead to people being less secure on the whole.
I'm sure someone savvy enough to use end-to-end encrypted communication channels will switch to less secure methods based off of a headline /s
This is the point of the majority of propaganda, really: it's not to convince the people who know anything about the issue; it's to prejudice the people who don't, so that it'll be harder for the people in the know to communicate the facts to them.