You are very conservative with the upper limits, probably because you are limiting yourself to medicine. With bioengineering the upper limits are hard to grasp. Why build a house, when you can grow one. Re-imagine all machines as custom-made biology. Why upload your conscience to silicon, when your body can be anything, your brain can experience anything, you brain can be reshaped to be anything.

How much is possible there, is only constrained in our understanding of biology. How difficult that turns out to be for a super intelligence… who knows? If we are actually on the cusp of the AI singularity, the future is going to be weird and/or wonderful and/or horrible, but definitely unimaginable different than today.

My mind is kind of shooing away from this intuitively. Too hard to believe. My whole life experience has been living in a different world. But imagine if "we" could actually create human level intelligence, say, for the price of a 100k USD/EUR/GBP. It could only do knowledge work, of course, but it would easily pay for itself and thus be mass produced. What is the market cap for cheap knowledge work? I would be surprised if it is only a billion human-equivalents, given humans find new creative ways to pay for themselves all the time. That explosion alone is mind-boggling and it does not rely on super-intelligence.

All of this should make one point clear: At no other point in history has it been more important to have our power structures be aligned with the interests of society.