In every movement you have over-enthusiasts/utopists who don't see the challenges. But even in a game like Deus Ex you can see it's not difficult to see the utopia [0] from reality [1].

Now, like everything : no one will get a new limb if he knows a corp will make him a slave for life. So for these companies to succeed they must guarantee peace of mind to their users. You don't fear getting addicted to aspirin every time u take it. Perhaps open-sourced with generics parts.

On a more philosophical note, car makers gave us more freedom by transcending our biological limitations (higher speed, no tiredness) but in exchange of some loss of freedom (loan, accessible areas, time lost finding a parking spot, etc). Nothing comes without a cost.

[0] https://www.youtube.com/watch?v=UG_oThcYsn0 [1] https://www.youtube.com/watch?v=HW1V1HQ5PDE