Gravity is readily visible. We may not have an explanation for why mass distorts the universe around it, but we know that it does.
Almost correct. The idea that it's mass that causes gravitation* is purely theoretical.
Gravity is not theoretical, its just not fully understood. But we use it to fly our space ships, we use it to make accurate predictions for many things. Gravity as a theory works well, in fact its never been proven false. We just keep changing our theory of how it does what it does.
Excellent. Then we are in agreement that it is not less "magic" than EAT.
1.) It is not purely theoretical, it is commonly observed that large mass objects posses a predictable amount of gravitation. Orbits of planets, shapes of planets, fusion, black holes, hell even standing on earth, its all observations of gravitation. As the objects get more massive/concentrated their gravitation also increases. There is a clear way to calculate how much gravitation an object will have, and what acceleration it will exert on nearby bodies.
2.) Incorrect. bendy light is not a common readily apparent phenomenon. Therefore it is not just as "magic" as gravitation. the first time i ever heard of bendy light (i have taken a number of astronomy, photography, and history courses) was on these forums, and from what i have read it is incomplete and not tested.