That's exactly what the black holes want you to think.

Basically what they are saying is that there's a possibility of something called a "gravistar" that would be a stable mass held together by dark energy instead of a singular like a black hole. Basically from what I read, it would have even weirder physics but would look exactly the same as a black hole from our outside perspective. My guess is that, in essence, if there's no way for us to tell the difference between a black hole or a gravistar than they could potentially just all be gravistars and we'd never know.

The more important issue is trying to reconcile the physics of quantum field theory and general relativity, which today are not compatible. The math behind black holes are a particular bugaboo, and we will have to change something before they can be reconciled