This was proven to be false on the WAN show. Only 20% of transactions were low confidence and handled by mechanical turk.
It's not hard to imagine edge scenarios for which the models aren't trained, like a customer dropping an item, or putting an item back in a random shelf instead of the one it's intended for, or someone picking up that previously randomly placed item, etc.
I think people just think that they must be misunderstanding something; that nobody could claim one thing while offering evidence of its opposite. 1/5 of purchases lose their significance.
Business Insider also reached out to Amazon at the time and a spokesperson denied that actually reviewed any transactions.
This "proven false" thing is just another anonymous source claiming that actually it was only 20%.
So you actually have no proof of anything, you just have three persons claiming three different things (0%, 20% and 70%).
[1] https://www.businessinsider.com/amazons-just-walk-out-actual...