Humans have been handicapped with a huge quantum computer they carry on their shoulders. The miracle machine, that may house as much as a billion qbits, has been bored out of its wits for over fifty thousand years. The best physical systems could come close to replicating is a million times less powerful. It may be truly ironic if the species gets wiped out before it understands what it may have been capable of.
Excess capacity has been costly in most situations. In the case of humans, they have been endowed with an organ, they could never truly understand. A quirk in the objective function obscured intelligence and presented useless constructs such as ego and wealth that drive most of the seven billion specimens across the blue planet. Some have put down reluctance of adherence to conventional expectations as disease and many have attempted to bridge the chasm with chemicals treating the brain.
If intelligence is a handicap, then a favorable direction of evolution is less of it. And, that will likely minimize pain for humanity.