I’d argue that the stars working that way is the optimal choice. People are going to buy chips anyway, they’re not going to stop just because every chip bag has 1 star on it. You even admit that in your own comment. That just makes the ratings pointless and is how you get people to ignore all ratings entirely.

The rating should compare how that item compares to similar options so you can see which of those similar options is better. It also incentivizes a manufacturer to make adjustments to their product to compete side by side.