Of course, investors should have access to all project information. After all, essentially every investor is a kind of co-owner of the project.
And there is! Owners of coins or tokens are in fact the owners of shares of the company. Therefore, you are right when you say that investors are co-owners of projects.
True, this is almost exactly the same business as in real life, the tokens are part of the company; when you buy them, you can either want to or dispose of them