This is a common misunderstanding. Copyright does not allow you to own an idea -- there is nothing in the law to allow that. Instead it gives you a right to copy something. Specifically, it gives you an exclusive right. When people talk about "intellectual property" the are referring to owning rights with respect to some intellectual concept, not owning the intellectual concept itself. The very common confusion that you seem to suffer from is the reason why the FSF has previously recommended that people don't use the term "intellectual property" -- because it is very misleading.
I could rephrase your statement as "...the more people understand why the idea of granting exclusive rights to an intellectual concept is stupid". I suspect it doesn't materially change your feeling on the subject, but it's important to discuss these things as they really are, or else people will just dismiss your argument without thinking about it.
Copyright is not a property right, but it relates to ideas the same as property right relates to real life objects: both define what one can do with the subject.
IMHO, one of the reasons why the copyright has gained success is because of existing cognitive bias[0]: people desire to treat ideas like physical objects, or as close to that as possible, because they have no other concept of what ideas are. I sometimes use figures of speech like "to own an idea" as a way to say the above succinctly, though it is indeed confusing when interpreted literally.
I could rephrase your statement as "...the more people understand why the idea of granting exclusive rights to an intellectual concept is stupid". I suspect it doesn't materially change your feeling on the subject, but it's important to discuss these things as they really are, or else people will just dismiss your argument without thinking about it.