Because lots of do-gooders like to file lawsuits against bad actors when they don’t have any actual injury. Conservatives like bad actors because that’s where the money is. Conservatives hate do-gooders because they interfere with the process of money-grubbing. Kacsmaryk and the Fifth Circuit are trying to adopt a do-gooder standard of standing that would give actual do-gooders standing to fuck up carbon emitters and water polluters and big finance.