You say that as if this has happened before ("many kinds of these inventions always start as..."), but what conditions have actually had this happen?
I can't think of anything that started as something to help bring people up to a median level, to then end up bringing median people into a super-human level. Everything we've done so far have all been ultimately limited by the human body, so things that bring people up to the median level ultimately have diminishing returns such that they don't benefit median people so much.
I can't think of anything that started as something to help bring people up to a median level, to then end up bringing median people into a super-human level. Everything we've done so far have all been ultimately limited by the human body, so things that bring people up to the median level ultimately have diminishing returns such that they don't benefit median people so much.