Say you are sitting in the passinger seat of a sports car while holding a bowling ball in your lap
when the car accelerates rappidly you will feel the bowling ball press into your lap. The ball has efectively gotten heavier.
the same as how jet fighter pilots feel their limbs get heavier when they make high g manouvers.
you'd think something would weigh the same everywhere.
It does. Telling you that things change weight is ludicrous. I don't know how you can so readily accept this when absolutely nothing you have ever experienced, suggests this.
I've been on roller coasters, undulating roads, and airplanes doing aerobatics. I have first hand experience of how weight can vary. I have not yet tried the "kern the gnome" experiment, but look forward to giving it a go.
G-force is not gravity. It's the reactive force felt by acceleration (see Newton's third law). This is measured in units of gravity as it F=ma depends on the starting mass, but is no more dependant on earth's gravity than a car's horsepower is dependant on horses. Its just a way to give it context.
They're not saying it has anything to do with gravity. They're saying it has to do with weight. Weight is a measure of force, and weight changes under various circumstances. In the examples above, those various circumstances are acceleration. So when you said:
Telling you that things change weight is ludicrous.
people gave examples of objects changing weight.
However, the Traveling Gnome Experiment shows that weight changes not just due to acceleration, but position on the Earth. Since FE 'gravity' (the apparent downward force we experience) is
caused by acceleration, this can really only be true if different parts of the Earth are accelerating at different rates.
Thus UA is demonstrably ridiculous, at least as far as trying to explain gravity.