> to put (loose) constraints on this universe's parameters.

I was referring to the fundamental constants of physics. A lot of argumentation has happened around whether they are "fine-tuned". In the sense that a small change has a radical effect on matter and spacetime, to the point where chemistry would not work at all to make any kind of biological entities, YES, YES, absolutely, our universe is fine-tuned for human life. Or vice versa. Human life is fine-tuned for exactly this universe, planet, climate (!), and time period!

There are several traps that philosophers and cosmologists keep falling into, primarily around probability. Clearly we are not in an average universe, from the very get go. We have no idea how these constants get set, what set them, if there was a universe before that had different constants, if universes elsewhere have different constants. Even if we did know that other universes exist, we have no way to reason about the probability of our universe--we don't know the distribution. If we were to start positing that the constants are randomly chosen, then we're in a very special universe indeed. But somehow, when it comes to these constants, the "probabilistic thinking" just gets forgotten. Philosophers just blink and look away. These constants are special as hell.

The next issue is that there is a huge philosophical problem in assuming that probability is even a thing, because every rando weird thing that has happened has fed into the stupidly improbable fact of our existence. The assumption that we are drawn from some kind of distribution is just a philosophical axiom that goes unstated. Maybe we aren't drawn from some probability distribution but are instead linked in causal chains impossibly long and intricate that using probability has a tool becomes meaningless. To understand what I mean there, just recall that the dinosaurs ruled the Earth for over a hundred million years. They were wiped out by an asteroid with a stupidly improbable chance of impact. The mass extinction that followed was so brutal that literally every single thing that survived pretty much made it by the skin of their teeth--including mammals. So every Tom, Dick, and Harry rabbit that managed to eek out survival on the blasted plains, carrying their painstakingly tuned genetic code, mattered. To the extent that many whole genera of life today depend on literally just a few individuals having survived this cataclysm. The Earth didn't mint new kinds genomes from nothing, they grew and branched off what survived. And it wasn't luck...they were better adapted to the new hellscape. Or was it? Sliced as finely as single individuals, we might be here because a single proto mammal survived a harsh winter or leaped out of the jaws of a predator at just the right time. Put odds on that one.

But speaking of "luck", it wasn't "luck" that the asteroid hit at that moment. It hit because of orbital mechanics, a complex but completely predictable mathematical certainty of orbits and periods. Pretty much all the macro events that we observe as being to have led here to this moment with these funny barely space-faring apes yammering at each other through HN are deterministic, not stochastic events. And the next thought that pops into your head on how to reply won't be stochastic either.

Reasoning about our universe using some Drake-equation-esque probability floundering is a complete waste of time. We got here by history and this whole freaking show is one giant example of selection bias. Average universe, my ass!