The difference being that if they were as unethical with other companies' tech as they were when expanding into markets and failing to protect their employees from harassment, then it could be an existential problem for the company. If their future relies on self-driving tech, which they never get a chance to implement because the only tech they have is stolen and they thus can't use it, they're fucked.

And the relevant legal standard here would be "preponderance of evidence", not "innocent until proven guilty" (which is a right for individual citizens in criminal trials). Corporations aren't fully people yet.