Why Are Dark Stars Not Real?

From our point of view, it would look like a stable thing, but it's actually not. And so, unlike a black hole, it could actually emit information. But i guess, why is it dark, and why is it emitting x rays but not visible light? Te question right? Because we have to match all the observations. They have to predict what we see. So how can these things be dark? Again, its gravity and the relativistic effects. If these things really do have this much gravity, because they are very, very dense objects, so much so that they have this crazy time dilation. That's well, let's get into why we think these dark