it is in fact an economic and sociologic thought problem. There is so much overwhelming evidence to show that this is the case, that the burden of proof is on you to explain it all away.
yes, you're right, humans have always been racist and still are today. That doesn't mean we should erase any and all knowledge racist people have ever generated. That would amount to literally everything.
Again, the commons is not an imaginary thought experiment, but a real thing that existed, and the so called tragedy is just flat out bad history.
William Forster Lloyd was an early 19th century British economist, I can fucking guarantee he was racist too.