Concretely, the company is not a single founder and his cronies. The company is a pile of paperwork (aka contracts) that dictate the relationships between (thousands of) people who are all involved in the enterprise, from factory workers and entry-level coders to investors. It is that pile of paper and the relationships it encodes that creates an output that is larger than the sum of its parts.

You can worry about whether the split of return is correct, but arguing that the pile of paperwork is valueless or somehow nonexistent is silly. Value flowing to investors is a consequence of how that pile of paperwork is set up and what is on the papers, nothing more or less.