For the same reason we never allow anybody to get the best possible result out of the market with no restrictions. Many businesses simply have more power than i

For the same reason we never allow anybody to get the best possible result out of the market with no restrictions. Many businesses simply have more power than individuals (customers and employees), in various cases both concrete and subjective. There's just no way to solve all behavior through regulation, though. In this case, the umbrella complaint is that people perceive businesses to have used their power, in various ways simultaneously during both long-term and short-term declines (and sometimes, in the worst cases, just because they can), to suffer less than individuals in relative terms. People obviously dislike this (if it's true). Maybe this specific look at grocers is or is not a good example - but regardless, you've spoken broadly, and I frankly find it a little hard to believe that you literally "don't understand".