I have read this many times in this forum. And find it reassuring.
Could someone explain whether the statement needs to be qualified.
My understanding is that persistent rapid AF may over a long period cause cardiomyopathy leading to heart failure. This is the basis for taking rate control meds.
And of course without anticoagulants we may have a major stroke.
Neither situation is inevitably fatal but can be.
Can we modify the aphorism to say AF probably won't kill you but might if you completely ignore it. As is, the statement might encourage complacency, both in patient and doctor.