That's one part of the bad mental model of organizations and markets (and thus societies) people have. The people at the top may be richer and more powerful, but they're not actually free to do whatever. They have a role to play in the system they ostensibly "control", but when they deviate too far from what the system expects them to do, they get ejected.
Never mistake the finger pointing at the Moon for the Moon itself. Also, never mistake the person barking orders for the source from which those orders originate.
That's the nature of self-reinforcing feedback loops.
Virus can kill their hosts, and a bunch of individuals can have significant harmful impact on societies.
Much like viruses, systems are subject to selection pressures over time. Systems that are too damaging to society makes society develop memetic, cultural and legal immunity against them. Systems that let individual members easily kill them are fragile and don't survive either.
Systems that thrive are ones that are mild enough to not cause too much external resistance, and are resilient enough to not allow individuals to accidentally or intentionally break them from within.
Their decisions are absolutely constrained by the system's values. They have zero agency in this, and are literally unable to imagine anything different.
There's no total ownership in structures as large as this - neither in companies nor in countries. There are other stakeholders, and then the organization has a mind of its own, and they all react to actions of whoever is nominally "running it".
The truth is, no one just acquires power on their own - people with power have it because other people let them, and they can wield this power only as long, and only in ways, as others allow it. Gaining power doesn't make one more free to exercise it - on the contrary, the more power you have, the more constrained you are by interests of those who provide you that power.
Or much more elaborately, but also exhaustively and to the point: https://slatestarcodex.com/2014/07/30/meditations-on-moloch/.
Your loss. The article is actually talking about the thing you're saying. And so am I. These are all people, not magical entities, and that is exactly why the near-term future of "AI being the new electricity" is inevitable (short of a total collapse of civilization).
The article spells out the causal mechanism 20 different ways, so I still recommend reading it if the dynamics are not blindingly apparent to you yet.
Another reply mentions that Bezos can't imagine anything different. If that is so (I am not unwilling to believe a certain lack of imagination tends to exist or emerge in extremely ambitious/successful people) then it's a personal failing, not an inevitable condition of his station, regardless of how much or little agency the enormous machine he sits on top of permits him to wield personally. He certainly doesn't have zero as the commenter claims.
FWIW I have read Scott's article and have tried to convince people of the agency of moloch on this site before. But the fact that impersonal systems have agency doesn't mean you suddenly turn into a human iron filing and lose all your self-direction. It might be convenient for some people to claim this is why they can do no different, and then you need to ask who benefits.