Maybe I have the wrong understanding. I thought the legal concept of a "person" can be said to be a legal fiction https://www.jstor.org/stable/1342652, but a corporation is not. It's a real thing that is created and exists according to corporate law. That might happen to use legal fictions as part of its definition, but the corporation is not a legal fiction.

But even if I was right there, I would agree I was trying to be overly pedantic and ended up distracting from the point I was trying to make.