You say that as if a lottery assigns companies what product they shall make. Or that they found their product designs in a kinder egg.

They had an idea which they thought will be valuable. And they worked bery hard on making that idea a reality.

People complain that companies don’t have leadership with long term vision. The leadership of NVIDIA heard the idea of GGPU computation and put the resources behind the idea to make it a practical reality. Here the gap between “nerdy idea” to “product sells like hot-cakes”, is measured in decades. That is not just luck.