Say a company that develops a product says or does something insensitive, in the earlier days, people would publicly boycott that product, related products or what have you. The company would either stand down and apologize, or put it's foot down and say it's right.
Now picture the same thing with Tik-Tok. There are innumerable instances where Tik-tok has been shown to be biased, censors specific content, etc etc.
Review bombing is as good as boycotting a company. Causing a company real consequences in response to their actions.
It's a form of rightful protest. I am not using the product. I am expressing my views about the product in a review system that is public and open. As long as there are no bots involves, Google is morally wrong, in my view.