"We fed it into this black box, and this is what we got, we don't know how it works". Of course the training data will probably be a weighted output of who pays google, rather than what will make the user happiest.
It's pretext to violate reviewing systems without looking obviously corrupt.
I just want to see the top 10 most rated things per category, then I want to see the top 10 things over a given threshold of reviews. I don't want googles mangling of the data, I just want to be able to query the review data.
If whatever google displays isn't better than the top 10 results in a given area sorted by number of reviews, it's clear there is a reason why. Whether it's devs creating unnecessary complexity to justify their employment, or a system designed to weight results in favor of who pays google, or the need to inject 'randomness' in order to be able to inject paid advertisements without them being 100% ignored, or to provide a reason to keep scrolling allowing more ads to be displayed, it's all anti-user behavior. This will just be another tool to manipulate a user rather than help them.