Some of the fine-tuning appears extreme enough to be quite embarrassing—for example, we saw that we need to tune the dark energy to about 123 decimal places to make habitable galaxies. To me, an unexplained coincidence can be a telltale sign of a gap in our scientific understanding. Dismissing it by saying, “We just got lucky—now stop looking for an explanation!” is not only unsatisfactory, but also tantamount to ignoring a potentially crucial clue.
