Honestly I thought the same thing until I was informed. This one actually came off my first spun motor and chalked it up as a loss, bought another one. Brand new one installed and machine shop made an error and spun that motor first 40 miles. I was pissed I had to toss out another oil cooler until I talked to my machining guy, then he explained it to me. It's a tube design inside and has no lips or anywhere for the metal to catch or get stuck.
Easiest way to put it, its no different then cleaning a block after a spun bearing. You just gonna toss the block? No, you're just going to clean it thoroughly. With that said, I have 1500 miles on my current build using the same oil cooler from my last spun bearing.