You can't prove it either way, people are complex and who is to say what sort of associations people have or used to have inside their head. The simple fact is that when Freud was coming out with his ideas they were new they were original. Most of anything we read is recycled. Having a single original idea is incredible and he had many that maybe wrong but eventually did lead to some right ideas.
Oh, indeed, I am a big fan of people being wrong in novel ways that open up new ways of thought. Much of the old philosophers is really their exploration of the space. Searching means looking in the wrong place most of the time. My problem is with those who came after and keep looking in some old place where there is nothing left to find.
