I definitely don't think this is the case. For somebody who hasn't trained - they're not holding 180kg on their shoulders. I think two big reasons would be that they're not going to have core strength/training to support it, and they wouldn't even have the traps to support the bar on their upper back, it'd dig into them and cause immense pain and probably just roll as well.
I think people might be able to support more than they think, but I'd also be sceptical that they could unrack 2x bodyweight without _some_ training.
Could they use a machine to load up to that point? Cushioned and loaded in a way that doesn't use traps/a barbell? Maybe.
I say this as someone who deals regularly with weights around that level, at a similar weight.
Having said all that, I do 100% agree that loading your back and getting the weight there are two different things!
For me, it actually seems fairly plausible. I was a fairly untrained 70kg forty-something when I went to the gym and very quickly found that as I did a bit of hiking, I could max out the standing calf raise machine at 155kg. This involves having a very padded 155kg on your shoulders while in a standing position. It felt to me like that was the most my shoulders and back could cope with, and it's more than double body weight.