Reasons Google would not want the financial status quo:

1. It tends to retard technical progress.

2. They have to make deals with entrenched incumbents to do finance.

3. There's nothing stopping a hedge fund manipulating Alphabet's stock.

Even if they do want to preserve the financial status quo, it's pretty difficult to see where the review score of a retail broker app fits in with that.

On the other hand avoiding review bombing is a Google Play store business objective, doing it in a half assed reactive way with an algorithm is Google's style, and of course it's also Google's style to not care about customer service nearly enough to wade into a debate about whether a pile on related to genuine upset with an app company's policy is really review bombing