I keep hearing this as the “Reason” but never backed by anything that makes sense. I’ve never needed to jump my generator to my house, and don’t particularly care to even in the event of “disaster” so don’t attack me like I’m doing this…

If you successfully suicide jumper your generator to the grid. Wouldn’t the collective load of all your neighbors stuff kill the generator? (eg bog it down to the point that it turns off? [if it has no breaker]) Also wouldn’t the load of literally your whole neighborhood trip off the breaker in the generator(or in the panel)? Doesn’t this leave it as the only “risk” is if you happen to turn on the generator as the lineman themselves are specifically holding a live wire with an active connection to a ground/neutral before the previous stuff can happen? Or only if they happen to isolate you and then you turn on the genny after? Wouldn’t you agree that this last thing would be an incredibly rare?

And I can never find an article where a cable was determined to be the cause of an electrocution…

Now because the internet is the internet… I’m not advocating for using suicide cables… There’s much easier reasons why this is a terrible idea (exposed live contacts being literally the primary one). But I just never understood the “lineman” argument with all the stuff that would have to go specifically “right” in order to do that kind of harm to a lineman.