The fact to be explained is why the universe is life-permitting rather than life-prohibiting. That is to say, scientists have been surprised to discover that in order for embodied, interactive life to evolve anywhere at all in the universe, the fundamental constants and quantities of nature have to be fine-tuned to an incomprehensible precision. Were even one of these constants or quantities to be slightly altered, the universe would not permit the existence of embodied, interactive life anywhere in the cosmos. These finely-tuned conditions are necessary conditions of life in a universe governed by the present laws of nature. it would be obtuse to think that the universe is not life-permitting because regions of the universe are not life-permitting!
If the expansion rate of the universe were not finely adjusted, our universe would not exist.
A H Guth ‘Inflationary Universe,’ Physical Review, D, 23, 1981, p. 348.
an alteration in the ratio of the expansion and contraction forces by as little as 1 part in 1055 at the Planck time (just 10-43 seconds after the origin of the universe), would have led either to too rapid expansion of the universe with no galaxies forming or to too slow an expansion with consequent rapid collapse.
It should be obvious by now that the fine-tuning argument holds in the relation to the universe as a whole, and is not meant to address the question of why you cannot live on the sun or breathe on the moon. Of course sources of energy (stars) are needed to drive life and evolution, and of course you cannot live on them. Nor can you live in the, by necessity, frighteningly large stretches of empty space between them and planets. So what is the point? Nobody would deny that the light bulb is an invention that greatly enhances modern life. But when you would try to hold your hand around a light bulb that is turned on, you would burn it to pieces. Is the light bulb then "hostile to life"? Certainly not. This modest example, however, indicates how utterly irrelevant the argument really is – one of those false arguments that appear to be brought forth and rehashed solely in order to avoid the deeper issues.
If the Universe Is Fine-Tuned, Why Is It Mostly Inhospitable for Life?