Alley Oop may agree with you, science doesn't!
Simple enough. The people telling us the Earth is 4B years old are the same mental midgets still trying to tell us that dinosaurs died out 70M years ago even in the face of this new and overwhelming evidence.
Aside from that, Robert Bass once redid Lord Kelvin's heat equations for the planet WITH a maximal possible figure for radioactive elements included and got an upper bound of around 200M years.
The true age of the planet is anybody's guess. As a collection of rocks it may be a few hundred thousand or a couple of million years old. Midrashim and Amerind oral traditions describe dinosaurs which were probably leftovers, walking around just prior to the flood. The true main age of dinosaurs was almost certainly a few thousand or a few tens of thousands of years back, and not millions or tens of millions. The planet's living world in its present form more or less is probably aroun d 6K years old as the Bible indicates.
Alley Oop may agree with you, science doesn't!
What makes you think it's a collection of rocks? Have you discovered the mysteries of the inner earth? So far, man has only been able to study the very outer surface, which is the equivalent of one hair- thin layer of an onion.
We only have theories of what the inner earth is made of, and we don't even have a decent explanation for what causes the magnetic field.