The issue is developing the negatives. In chemical photography, you don't just expose a piece of film to light and poof! it's a negative. You have to expose the film to light briefly, then keep it in the dark. Then you have to run it through a series of chemical baths that take the molecules of the film that were altered by the light, and "fix" them so they won't be altered by light anymore, while removing the molecules that were NOT altered because no light hit them, to grossly simplify the process. (even Polaroid film does this, it is just that the chemicals are embedded in a capsule on the film, and that capsule is broken when the film is removed from the camera, causing it to bathe the film).
Certain films require different chemicals, in different sequences. The chemicals and sequences for Kodachrome film are different than for Velvia, or other films, and for Kodachrome, are much more complicated (more chemicals, more steps, with very tight control over the time the film is in the chemicals, the strength of the chemicals, the temperature, etc.) That is why, as color films with simpler processes became available, fewer and fewer shops wanted to keep all the gear to process Kodachrome around, until there was only the shop in Parson left.
So you might be able to scan a developed Kodachrome negative on a good film scanner, pull it into your computer, and do "stuff" with it, but you still have to get the film developed first.