Control as we perceive it will be irrelevant the moment we reach
singularity as the human condition will fundamentally fail in the new environment surrounding us. We see everything through one big broken lens due to our biology. Technology grows exponentially, which will also include thought in AI. That exponential growth will be used to completely modify biology as needed at an extremely rapid pace. You'll see genetically engineered algae and bacteria used to make composites and energy as well as nuclear fusion becoming a norm for every aspect of life. Medicine won't be needed as nearly all life will no longer be biological. It will still exist in an extremely advanced form but only used for pet projects on species AI want to preserve in their natural state.
All the Sci-Fi movies and books are extremely flawed in their vision of mankind's future because they all believe mankind will be at the center of growth, the focal point of existence. The problem is that our biological capacity will be so useless and fragile in this exponential world that we likely won't exist or will in an extremely changed state, likely just our neural network living in voluntary computer simulations while sentient AI expand across the universe communicating through quantum boundaries. Our literal best hope for man's future is that whomever creates the first sentient AI creates some form of hard coding that implies the machines should preserve life.
And I don't mean any of this in a dystopian way, simply an evolutionary one. Ask yourself, how relevant or important is a horse in your life? It's not, because a cheap and luxurious machine that's more reliable and outperforms it by many hundreds of times now exists for you to use. In another 100 year's we will be the horse, kept around only for entertainment, no longer of functional use.