I don't even disagree with you there. Pretty much every human concept is made up by our own minds. The economy as a whole is an especially hilarious case since fiat money is backed by literally nothing since 1971.

However, I do draw a distinction between reasonable enforceable laws and schizophrenic unenforceable laws.

Most laws are pretty reasonable. The vast majority of people are peaceful. Relatively few people commit cold blooded murder. When one does happen, criminals are caught and imprisoned so that they are no longer part of society. It's a manageable problem.

Intellectual property is not like that. Infringement is as easy and normal as breathing. It happens every day at massive scales. It happens every time you download a nice photo from some website and send it to a friend. There are so many infringements taking place you cannot hope to ever punish them all. Often you cannot even catch perpetrators. The law is essentially unenforceable against the common man. There is no point.

In my country I've seen copyright infringement figures at over 80%. As in, 8 out every 10 people has infringed copyright at least once in their lifetimes. People talk about downloading music like it's nothing. Copy shops get set up literally next door to universities to help students copy entire books and course materials. Video game consoles are bought already modchipped straight from the stores. Every town has an informal market where copied media is sold cheaply, there's one less than 10 minutes away from me. Is this really a crime? Maybe it's actually a custom, already part of our culture.

Intellectual property is quite useful when used by corporations to attack other corporations. Companies are juicy targets for lawsuits. There are also less of them, their numbers are manageable. Leveraging intellectual property against normal folk though? That fight is unwinnable and I really wish they'd stop trying.