Not just software, but everything. Look around you. Everything around you was made somewhere. The example I like to use is shower curtain rings. Those plastic or metal things that hold your shower curtain onto the rod. Somewhere, there's a factory that makes those. The person who owns that factory is probably rich.

My first job out of college was working for a company that makes tilt-tray sorter systems. These are giant machines that go in warehouses and sort packages into, for example, different bays to go on to trucks to different places. It's like a little roller coaster for boxes. It was something that I had never even considered the existence of before I worked there. But someone has to make it.