The comparison is between having a single working car that you pay someone to fix when it breaks vs. owning a car that you can fix by yourself by having lots of

The comparison is between having a single working car that you pay someone to fix when it breaks vs. owning a car that you can fix by yourself by having lots of tools and parts around. The first is minimalist because it involves less physical material to store and organize. The second is self reliant because you can do for yourself without needing to draw on outside systems as much. The example you gave is just moving the goal posts completely. The large many car garage case is both less minimalist and less self reliant, so not to the point.