On the other hand I don't see how fake reviews and bootleg items do anything but hurt Amazon by making people distrust the platform. You don't want to add friction to the buying process by making people triple check that they're not getting duped.
And it's not like it's a new problem either, lack of trust was a huge issue in the early days of e-commerce, I'm sure Amazon doesn't want to return to these days where you felt like you were swimming in a sea of scams.
Whereas now it's more akin to eBay which always suffered with scam problems (and responded by giving buyers far more power - which then resulted in buyers scamming sellers instead of the reverse).
I wish it could return to the days where you just bought stuff from Amazon - or at least make it very easy to only search for their products.