> We have made certain observations that are assumed to be the result of matter falling into a "Black Hole". We do not have any observations that show us this as a fact.
Do you believe in gravity? We've never observed it directly, always just its effects.
I believe in the observational effects of something we call gravity. As to its nature, that is still unknown. GR is one model/theory and it works most of the time. But there are observations that do not fit into this model. That is the sticking point - these observation suggest that, though GR is useful, it is seriously flawed.
Can we use it, yes. But to believe that it is true, that is something quite different.
Do you believe in gravity? We've never observed it directly, always just its effects.