Quantum Gravity Unification

Now, why am I seeing this factual comment in grey?See here for instance a popsci take on the problem: https://www.scientificamerican.com/article/is-gravity-quantu...Everybody expects a quantum theory of gravitation, but if we were drawing it from scratch no one would make it that weak. It is a difficult problem, people work in string theory because you ca

Solve quantum gravity in a way that can't possibly be confirmed empirically.

It is just a model though! Everything in science is just a model. We better hope it's just a model, because it's incompatible with quantum field theory, which is another very accurate model. The only consistent model that bridges the two, superstring theory, says that spacetime and gravity could fundamentally be many things, from closed strings travelling between D3-branes to the holographic projection of a conformal theory - and you still get the same predictions.

Is t the problem of quantum gravity related? Does this being us closer to a grand unified theory?

Intuition at GR-scale problems. Why I need to believe in Einstein postulates if I can just look at walking droplet 2D model of QM and see that these postulates are obvious?

No, we're saying we haven't come up with any alternative that's as good at explaining a whole lot of things.For what it's worth, I hate it too, and I'm quietly betting on the paper a while back that showed GR was all you need as long as you can be bothered to do the really really hard maths.

Perhaps unification of QM and general relativity?

I'm surprised that more sibling comments aren't covering the lack of a unified theory here. Currently, our best understanding of gravity (general relativity) and our best understanding of everything else (electromagnetism, quantum mechanics, strong/weak force via the standard model) aren't consistent. They have assumptions and conclusions that contradict each other. It is very difficult to investigate these contradictions closely because the interesting parts of GR show up on

I’d assume quantum gravity stuff?

No. That's surprisingly easy[1], and the last time I checked they hadn't reproduced anywhere near the full theory of general relativity. They've just found a thing that suggests that it's possible to map things to a curved spacetime manifold. If I remember correctly, they didn't actually show that this was in any way natural or the only possibility.[2][1] There is more than one way to model GR or large subsets of it either mathematically or physically. I