I don't see that to be the case. Physicists have been giving their utmost to try to crack open the standard model and prove it wrong for decades. And the same is true elsewhere as well. We thought we had a pretty good grasp on the nature of the expansion of the Universe, but it turned out that the expansion is accelerating. That was a huge reformulation of cosmology. We thought we knew about planetary formation, but once we started finding exoplanets we discovered many of our assumptions were wrong.
As far as black holes, we have not 100% direct evidence of them, but we do have many independent and very strong lines of indirect evidence. For example, we can see stars in orbit around an incredibly massive object at the center of our galaxy (Sgr A*) that is not luminous. There are no models that make sense for anything that could be so massive and so dark. Black holes are the only theory which fits all the evidence we have, that's how science works.
Well, that's how physics works. Physics is stupefyingly strict about its methods. Most sciences don't put quite as much value into models. The problem is that in a desire to strictly follow the method, physicists have become complacent with regards to extraordinary claims. Sure, the universe is full of dark matter, connected by tiny strings, in between folded up dimensions, but gravity is leaking away into parallel universes, since that's what the model predicts (rather than it just being a mathematical anomaly arising from botched assumptions). It's comparable to an economic model that describes inflation as the work of invisible leprechauns who increase prices during the night. Sure, it might make accurate predictions, hell, it might even be true, but you should not put any value into it unless there is evidence that the universe actually works in the extraordinary way the model claims it does.
Biology has followed a much better path over the past century, and biologists are rapidly building up an extremely thorough understanding of how biological systems work without relying heavily on algebraic models. Physics fails to provide explanations for even the most basic physical phenomena like motion. It's effectively just assumed to exist as a law because some authoritative physicist said so and all other models rely on it.
Most of the understanding of biological systems that you're touting ultimately punt their hard questions back to the physicists, so you're really not any better off.
To put it differently, biology can't answer why paraplegics can't walk without first answering how people walk. You can't explain walking if you can't explain motion. Unless the biologists have been holding out on us, they don't have an explanation for motion that would satisfy us any more deeply than you do. Thus, if physicists can't explain something as basic as motion, then biologists can't explain something as simple as why paraplegics can't walk.
Sorry, I don't mean to be insulting, but I find this to be quite laughable. Firstly, neither string theory or "gravity leakage" or more than 4 dimensions of space-time are even remotely accepted theories in physics or cosmology. The theory of dark matter is supported by many hugely disparate lines of evidence. It's the only theory that makes sense given all the evidence.
> Firstly, neither string theory or "gravity leakage" or more than 4 dimensions of space-time are even remotely accepted theories in physics or cosmology.
Are you implying that TV funding is tantamount to scientific authority? Are we to believe dragons and white walkers are accepted scientific fact along with mitochondrial eve being a cylon hybrid?
And how many dragons and white walkers and Cylons are featured by Nova specials, the Discovery Channel, and get pop-sci articles written up in Scientific American?
Black holes are not the only theory which fits the evidence we have. Simply add 2M to the first 2 r's in the Schwarzschild metric (the equation used to confirm black holes), and you get a metric that fits all the evidence but doesn't predict black holes, hence doesn't raise the black hole information loss paradox, and so isn't incompatible with quantum mechanics that way. That's well known in the cosmological community, but ignored.
We have evidence of luminous matter falling into a black hole and disappearing. What more do you want? What possible other non-black-hole theory fits that evidence?
An "almost black hole" also predicted by Einstein's theory predicts the same observation, as an effect of gravitational time dilation. The non-black-hole theory that fits the evidence is the tweak you replied to. As I said, it fits all the evidence.
As far as black holes, we have not 100% direct evidence of them, but we do have many independent and very strong lines of indirect evidence. For example, we can see stars in orbit around an incredibly massive object at the center of our galaxy (Sgr A*) that is not luminous. There are no models that make sense for anything that could be so massive and so dark. Black holes are the only theory which fits all the evidence we have, that's how science works.