Actually SOME humans invented YET ANOTHER FAKE "CRISIS"
That whole fiasco regarding CFCs and "ozone depletion" was bad enough, as the hoax it was (but it conveniently opened the way for newly patented refrigerants!). Anthro-climate-change apparently isn't enough of a hoax EITHER, as net zero nonsense and climate cult panic rapidly wanes in the face of predictions that have not happened and economic pain for the PEASANTS (us).
No, we must INVENT SOMETHING NEW to scare people and point fingers at those who stand in the way of totalitarian control and Neo-feudalism (like Elon)
At a minimum CFCs weight about 2.5 times as much as air (Cl-F-methane specifically, the lightest one). Heating (and maintaining) that chemical at 1000F until it reaches an altitude of 100,000 feet or so is what you have to do to make it deplete ozone. And R12 refrigerant is considerably heavier. Basically you need a volcano (which on its own spews LOTS of ozone depleting stuff) to get CFCs to the upper atmosphere to deplete ozone. Not happening when your car air conditioner is vented.
In a lab CFCs deplete ozone. And so do aluminum-based materials, apparently. Only this time, the hoaxers came up with a "clever" way of "getting the material up there" by having it fall from space. Keep in mind that fine dust falls to the ground. And according to THIS, over 5000 TONS of extra-terrestrial dust is 'swept up' by the earth every year. When you consider the overall abundance of aluminum in that dust you get round 500 lhs of aluminum falling from space every year anyway. That and a whole lot of stuff that would be FAR WORSE for ozone (like sulfur, magnesium, and carbon) that are in much larger amounts, which would separate from compounds into elements at "burn up in atmosphere" temperatures.
Aluminum combines with oxygen on the surface of the metal to form aluminum oxide. Once formed, the rest of the metal stops reacting with oxygen. But other materials in far greater abundance would continue reacting until they are fully depleted (like sulfur and magnesium and carhon). I doubt very seriously that a handful of satellites containing aluminum would make a dent in the ozone compared to 5000 tons of "everything else" every year.
subsequent note: even with Al2O3 as a catalyst you still need the CFCs to get up there and they are STILL way too heavy to make it!!!