>A lot of phenomena in astrophysics are ridiculous, but real.
No there are many ideas in astrophysics. We don't know if they are real.
Dark matter? Maybe or maybe not. Dark energy? Maybe or maybe not.
Hawking radiation? It is an idea, it hasn't been proven or disproven.
Speed of light limitation? Probably, but how are neutrinos that have mass going 99.9999% the speed of light? That should require almost infinite energy shouldn't it?
Big bang? A large body of evidence points to a time limit to the beginning of the universe, but cosmic background radiation is the only stronger evidence of a big bang --- yet this could have another explanation.
Cosmic inflation? Could be a non-starter for reasons we currently don't have a handle on --- case in point, it is only happening *far away*. Supernova are used as standard candles, but what if we had different looking supernova 10 billion years ago and our measurements are wrong, therefore inflation isn't happening.
Astrophysics is an emerging field, even now. There are few ways to test all the ideas.
Many of the theories of the exotic blackholes rest precariously on a shaky house of cards, because there is no convenient way to test the ideas.