The reviews are already useless. We had plenty of discussion here about that, won't go into details. Again, it was just an example, don't get stuck on it, there are a million ways to fool the public because:
1. There is just too much information to obtain to make an informed decision. There is not enough time for a regular customer to dig into all that. We know these things because we are insiders. That's why you need regulation bodies made of experts to pass legislation to protect the customer.
2. The information gatekeepers are the same who are pushing the enshittification. Where are you going to search for better service? On Google's search engine. Who processes the reviews and decides which to show, which to flag? Again, Google, Amazon, etc. You can not rely on their tools to help you inform about their service. This is why we need regulations about search results.
In conclusion we can not simply rely on customers adapting.
The point is those small brands won't be trusted. People will make more effort to check reviews, or demand stricter warranty laws, or the like.