I mean… just let the player play a half-orc. It’s not like Krynn is really defined by the absence of orcs. They still had goblins and similar creatures. (And, some of the broader stories had orcs, too, and the setting didn’t fall apart).
I don’t know about that. If I know I can’t make any meaningful choices, then I’m not going to try to do so. I mean, if I agree to play an adventure path, I’m not going to try to make choices that may deviate from the path.
My lack of attempt doesn’t mean that choice isn’t being denied to me. It just means I’m aware of it.
Yup. Again, my experience during play isn't really changing. I know I’m supposed to stick to the path, so I do. It’s more like I’m proactively railroading myself so the GM doesn’t have to.
This is a definition issue again. You see constraints on player choice as railroading - even if they are transparent, known and fully accepted by the players.
I, and many other participants here, only consider it railroading if the constraints on the players are hidden or otherwise involuntary (this is not limited to illusionism, that's just a very common form).
Since this is a case of neither side accepting the other sides definition - it's a pretty difficult issue to see eye to eye on.