I think you're right but only partially. As individuals, we do have free will. However, being an individual is not what it seems on the surface. Some would say that consciousness originates purely within the brain, which is likely not entirely accurate IMO. However, our brain function is determined by genetics, what we consume (e.g. food, drugs/medications, etc.), and our past experiences. So, it's not really "us" per se. Our end behavior may be "our" decisions, but what makes "us" up includes many factors that aren't directly within our control.
Few of us truly have "original" ideas very often. Though, in some cases (relatively rare ones), people do have ideas that are inspired solely by their own observations. Realistically, this isn't that common for most people. Though, an extremely intelligent person could have them somewhat more often than most of us. However, even in these cases, there's still external inspiration behind it. It didn't come solely and completely from one's own mind.
