[...] this is the species whose main excuse for not doing something is 'if only I had more time'. Perfectly valid until you realise they do have more time. Not eternity, granted, but they have tomorrow. And the day after tomorrow. In fact, I would have to write 'the day after' thirty thousand times before a final 'tomorrow' in order to illustrate the amount of time on a human's hands.
[...] the whole of human history is full of people who tried against the odds. Some succeeded, most failed, but that hasn't stopped them. Whatever else you could say about these particular primates, they could be determined.