I’m not claiming it doesn’t have predictive powers. But the theory does parameter fit through the addition of dark matter and dark energy into the model, which we don’t know if they exist since we have absolutely zero theoretical description of what they would be. And 85% of the observable universe is supposed to be this unobservable thing we have no model for? That doesn’t feel like parameter fitting to you?

And while it does have predictive powers, it’s equally important to be honest about its failed predictions which have skyrocketed since Webb conclusively showed the age of the universe doesn’t fit that model. That tells me there’s an elephant we haven’t found yet.