To address this question, apply a mathematical trick, and convert it to the equivalent "Why aren't happy people smarter?". This new question admits a range of straightforward solutions, depending on how kind you are to the handicapped.
Very cool, but may have some unexpected consequences. E.g., someone can probably use this to synthesize a bacterial genome containing every known drug resistance gene, and this is just the first thing that comes to mind. Possibilities for bioeconomy indeed.
You don't need to synthesize an entire bacterial genome from scratch to do this. You can just insert them one at a time into existing bacteria. Or just give them plasmids. Anyway, the ability to achieve the outcome you're describing has existed for decades.
This may be as good time as any to plug my calculator for finite resistor networks (including grids) [1]. It works by eliminating non-terminal nodes one by one with the Star-Mesh transform, while keeping the exact rational resistances at each point.
