Most, if not all, corporations are misaligned to humanity's well-being. That is, they want money, and that's not exactly the same thing as what would be best for humanity.
This is okay though because corporations are the same class and kind of intelligence as the rest of humanity and so they can be (somewhat) predicted and constrained by our laws and norms.
Because corporations are the same class of intelligence, they can't outsmart everyone. We can catch them when they do wrong and punish them and use laws and courts to control them.
Because corporations are the same kind of intelligence they (usually) aren't going to do things we might consider insane or sociopathic. For example, if corporation X realized they might make a profit by taking out life insurance on workers and then getting them to do very risky things, X Corp probably wouldn't do it and if they did people would leak it and laws would be made to stop it.
The paperclip thought experiment is an illustration of a different kind of intelligence that wouldn't be constrained by human morality or norms and would surpass human intelligence and not be constrained by laws or force either.