Protecting smaller retailers and companies from being boxed out by large companies who stifle competition by manipulating pricing is at the forefront of the Biden administration's efforts to make sure the economy is a level playing field. At the same time, enforcing antitrust laws to their fullest extent by filing lawsuits like this is the best way for the government to assure consumers they're paying the fairest prices for goods.
If the FTC's goal is to make sure consumers are paying fair prices, it should be careful bringing a suit under a law that's nearly a century old and hasn't been used in a quarter-century. Robinson-Patman could make it illegal to offer discounts that typically reduce costs for customers. The government may be overreaching in this instance.