main thing to note from the study is how low the chances are with CPR.
Training makes a huge difference yet still it's low. Of course, some have no chance unless they happen to be in an ER at the time, but paddles are where it's at. Dramatically higher chance of survival AND faster so less likely to have brain damage from lack of O2.
...says me who's never got around to the first aid course I've been intending to do for years