Re: Chats with Cook
Not really, more the opposite.
The driver behind it is mostly about limitation of liability, and ease of transference of ownership. As a shareholder you have a barrier between you and the company's problems (so if the company were sued to oblivion, you pay no more in, for example). If you were a partner in an old-style partnership you are personally liable. As a partner if you want out, the partnership has to buy you out, which can be a pain in the neck. Likewise if you die it's a pain. With shares the name on a piece of paper changes and the two parties agree a price independent of the company.
It's a separation of ownership and control, which is fundamental to how this works.
Having shares gives you ownership, but not control You grant control to the directors of the company, and every year get to vote on their continuance in office or otherwise. That is how you get your direction of the company.
The other way is to say "I don't like the direction CompanyX is going in, so I will sell my shares and invest in CompanyY whose direction I like".
Of course, if you own a lot of shares it's likely you'll get direct access to directors as they know you can have a big influence come AGM and director re-election time (or just dump shares and crash the share price, which causes them and other shareholders some pain).