Doesn't that break down due to a total measurement bias? That is, if the universe were not tuned for life, there would be no-one around to wonder why that is the case.
Isn't that just the anthropic principle? That's another explanation for a life friendly universe, but not something that can be proved or taken as proof.
But you wouldn't post such things on another day, on another thread, on a topic unrelated. Hacker news and the commenters here are not gods finely tuning comments.