The comment you jumped in to "correct" was based on the equivalence of inertial reference frames which you can take up with Newton, and the equivalence of force-accelerated and gravity-accelerated reference frames which you can take up with Einstein.
If you don't like the thought experiment commonly used to give people an intuition about the Equivalence Principle then come up with a better one. I don't think yours holds up either, I'm guessing that thanks to the Uncertainty Principle you'll also need infinities to generalize it.
If you don't like the thought experiment commonly used to give people an intuition about the Equivalence Principle then come up with a better one. I don't think yours holds up either, I'm guessing that thanks to the Uncertainty Principle you'll also need infinities to generalize it.