The anthropic principle has been co-opted to indicate a creator of the universe, an intelligent designer ;The fine-tuned universe argument offers an image of a creator god fiddling with the various control knobs to arrive at design for the universe whose settings will most likely create life - and the ultimate expression of this purpose, amongst the faithful, is us, humanity. Problems abound. As a biological pinnacle, humanity is hardly a great model - just take a look at the anatomy of the eye, or the route of the recurrent laryngeal nerve for examples of that.
Co-opting the anthropic principle as evidence of an intelligent designer is an example of the projection of a belief over-riding logic. The fine tuned constants and their relationships are only remarkable or mirculous if one posits an intelligent designer working to an endpoint; otherwise they are unremarkable.
You can argue for the rather trite weak anthropic principle which is, simply, that "conditions that are observed in the universe must allow the observer to exist".
Building a proof upon a foundation which is itself a tautology, and an unfalsifiable one at that is a mistake.
Our observations to date tell us that, in fact, it would appear that life as we understand it - ie life on earth - actually appears to be pretty rare, and that therefore those physical constants do little to advance carbon based life; It could be argued that we are here in spite of those constants rather than because of them.
And such an argument also fails to take into account all the other factors that were undoubtedly important in the rise of mammals, and eventually humanity - like the chixcalub meteor strike for instance, which is thought to be the extinction level event that did for the dinosaurs and cleared away for our ultimate ancestor.
Jokos original question still stands - if there was an intelligent designer to the universe, why not create the whole thing a bit more intelligently, a bit less wastefully?
It seems to me that the anthropic principle is essential a logical fallacy, a gigantic case of post hoc ergo propter hoc.
Douglas Adams on puddle thinking, of the theory of the fine-tuned universe...
". . . imagine a puddle waking up one morning and thinking, 'This is an interesting world I find myself in'an interesting hole I find myself in'fits me rather neatly, doesn't it? In fact it fits me staggeringly well, must have been made to have me in it!' This is such a powerful idea that as the sun rises in the sky and the air heats up and as, gradually, the puddle gets smaller and smaller, it's still frantically hanging on to the notion that everything's going to be alright, because this world was meant to have him in it, was built to have him in it; so the moment he disappears catches him rather by surprise. I think this may be something we need to be on the watch out for.