I love my job (and I would say to an atypical amount), and I'm on meds... But this doesn't change the fact that some days you just don't have the energy or brainpower to do anything - especially if your job requires deep thought and concentration.
It's taken me a good while to learn not to feel guilty about this, and also not to take it as a sign of me not liking my job.
Imagine what we could have achieved globally if we had spent all that money on a different cause.
We could have managed to establish a colony on Mars, or perhaps we could have even finished developing Star Citizen.