Sorry John, it doesn’t work like that. Saying that the earth “looks old” is like saying that Mount Everest “looks tall” when seen from the ground. Saying that it “doesn’t look old” when seen from another viewpoint is like saying that Mount Everest “looks small” when viewed from an aeroplane. But in both cases, you can actually measure it, and come up with a very specific number: a height of 8,848 metres. This height is exactly the same no matter what viewpoint you measure it from.
It’s exactly the same thing with the age of the earth. You measure concentrations of various isotopes in rocks, along with their respective decay rates, and no matter which viewpoint you adopt, the result comes out the same: the earth is 4.54±0.05 billion years old, and the K/Pg boundary was laid down by the event that wiped out the dinosaurs 66,038,000±11,000 years ago.
Attempts to interpret the evidence differently quite frankly descend into patent absurdity. In order to squeeze the nuclear decay evidence into 6,000 years, the young-earth RATE team resorted to proposing levels of accelerated nuclear decay on a scale that, by their own admission, would have raised the temperature of the earth to 22,000°C. It’s like trying to fit Mount Everest into your pocket. It simply doesn’t work.