Sadly Prof Halvorson and co. are victims of bad thinking.
It reminds me of someone on this who proved that others did not exist, because their existence is extremely unlikely. Of course my existence is extremely unlikely, however my existence is 100% a fact. My existence does not depend upon probabilities, but on facts.
Fine tuning does not create life. Fine tuning makes life possible. Without fine tuning human life would not be possible, even though it is still be improbable.
Human life came into existence because a large number of events took place in precise order within this fine tuned universe. When we look at what happened with 20-20 hindsight we can see what happened and how it worked out. When we try to look at events from the point of the view of the Big Bang it makes no sense.
The proof is in the pudding. This is the evidence of science and theology, not of philosophy. Life is good and meaningful because it is good and meaningful, not because Darwin said it is or is not.
Human life may be improbable, but life is not based on probabilities. Life is based on order and purpose. Life is created by God and guided by God and exists because God created the universe and every aspect of it and made it with the obvious purpose to create life.
The fact is life would not exist if there was not fine tuning, so how can we say that the universe is stacked against the e4rxistence of life. Life would also not exist is of many events did not happen in particular order, so again how can we say that the universe is stacked against life. We cannot.
All we can say is that the life could not exist in a Darwinian unguided universe, which means we do not live in an unguided Darwinian universe. We live in a guided ecological universe, designe4d by God.