Haha, it is quite a good analogy! The drives even contain schematics on how to build a really fancy computer, but they are very complex and if you try to change something it usually breaks down. So in the end you just write really simple instructions to each drive, throw them in a box, shake it, and discover that the drives themselves self-assembled into the computer you wanted.

DNA nanotechnology is amazing! You can see a 3D visualisation of the assembled structure here: https://nanobase.org/structure/196