Neuroscientist David Linden says the human need for love is actually the indirect result of our inefficient neurons.
Constant touching and emotional warmth are essential to cognitive development, yet our educational and professional environments are skeptical, often for litigious reasons.
Just as Shakespeare's Prince Hamlet is more often bedeviled by his own thoughts, enhancing your brain might one day mean shutting parts of it down, not getting it to fire on all cylinders.
As François Jacob famously said, evolution is a tinkerer and not an engineer. When you're a tinkerer, you throw things together to solve the problem at hand.