You're straying away from the point and overcomplicating things. When a company has an open position and it is filled by an H1B worker, an American worker has

You're straying away from the point and overcomplicating things. When a company has an open position and it is filled by an H1B worker, an American worker has lost that opportunity. That's zero sum. Whether or not H1B workers are going to go on to create more jobs has no bearing. You could say the same thing about the American worker that lost that job opportunity. You realize that just because something is named a "fallacy" doesn't mean it is one. Economists have bias too and are often employed/used by lobbyists to sway analysis.