We can, but it quickly becomes nonsense.
The problem with existential luck is that we don' know the odds. Obviously, based on our current understanding of physics, we can come up with an estimate. But that understanding has to be wrong, because we can't explain why the universe exists at all. Forget the cosmological constant having lucky values, what are the odds that physical constants exist as opposed to there being a matterless void?
I could make an unfalsifiable prediction that there is some sort of N-dimensional super-soup where all 3 dimensions of space, time and physical constants and maybe some huge number of others to determine starting conditions are an axis on a hypercube of unimaginable proportions. Then, everything is a certainty. The amount of luck involved in any particular space-time-other point existing is 1 and there is no luck anywhere. In some sense reality has to be of that nature, because the odds of us existing by chance is so small it suggests that our model is wrong and our existence was in fact guaranteed.