I think the idea is that the universe is perfect for life. If just one of the four forces of nature were different by just billionths of what they actually are, there would be no complex life.
These would be, of course, 1) gravity 2) electromagnetic force 3) weak nuclear force 3) strong nuclear force.
Then there's also the expansion rate of the universe. Seems dark energy is throwing a monkey wrench into the mix. No oscillating universe, which means only one beginning.
To say "the universe is perfect for life" is to say "I'm unable to understand that even though the circumstances of our existence are too bizarre to comprehend in any meaningfully complete way, I know for certain that if things were bizarre in a even slightly different way, life could not exist."
It's a childish line of reasoning.