@layman,
You are doing Science by Google again.... I am trying to be patient here. You are not arguing about Albert Einstein.
You are arguing against the classical Phyiscs that is taught in high school and was understood by Galileo and Newton (long before Einstein and Feynman). There is a basic flaw in your line of reasoning... I tried very patiently to correct it. You can't possibly understand even basic Physics without getting over the flaw.
In science, a mathematical model is correct if it is testable, and is confirmed by experiment and observation. Newton undersood that there were multiple reference frames, and that his laws would work in any of them.
In high school, kids get a feel for this by working within different reference frames. We have them drop balls off of moving carts and doing the math both ways. It works either way.
There is a basic flaw in your reasoning that you can't seem to see, and you can't seem to get over.
But high school students learn frames of reference, and do experiments that show the laws are valid in any frame of reference. And, high school students understand stand this perfectly well.
This was a core part of Physics for centuries before Einstein came along.