It's 100% irrational. We just didn't evolve to exist in a world with refined sugar at every street corner. We aren't equipped to make good decisions about it

It's 100% irrational. We just didn't evolve to exist in a world with refined sugar at every street corner. We aren't equipped to make good decisions about it easily, it is a constant battle between our long-term decision making and our natural quest for easy to digest energy.