Much simpler definition of a planet than the one currently in use:
Planet: Any object containing large amounts of “metals” that is massive enough that gravity forces it into a “round “shape (hydrostatic equilibrium).
List of planets:
Jupiter
Saturn
Uranus
Neptune
Earth
Venus
Mars
Mercury
Pluto
Eris
LIkewise, “moon” is a silly word to describe natural sattelites. Any pebble in outer space will orbit any boulder. We will find thousands of “natural sattelites” in this solar system alone. The Moon is one million times larger than any other moon around any of the inner planets!
“Moon” should be used to describe any object that would be a planet, but which is in orbit around another planet.
Such Moons:
Ganymede (Jupiter III)
Titan (Saturn VI)
Calisto (Jupter IV)
Io (Jupiter I)
Luna (Earth I)
Europa (Jupiter II)
Triton (Neptune I)
Triton is seven times more massive than Oberon, the most massive sattelite that does NOT fit this definition.
I agree with your assessment.