You’re mixing different levels of abstraction and equivocating across them.
Sure, no human could produce anything modern on their own, without knowledge, training, support, materials, products, labor, etc. that comes from others. A child raised by wolves will never launch a new line of tennis shoes.
At the same time, no complex effort comes to be without someone’s motivation and effort to take the risk, coordinate the activity and see it through. It doesn’t have to be one primary person to do so, but it certainly can be. It is not difficult to look at the history of a given project and conclude who most acutely put it into motion. The choice to incentivize this acute influence has trade-offs, but many different societies across history have tried many variations of what / where to incentivize. Abstracted, that’s one of the main points being discussed here.
That doesn’t mean all stories about who started / created / produced something are told accurately. But to throw your hands up and say “everything comes from everyone” is completely useless when designing society with the goal of solving problems, providing for its members and improving the human condition.