There is also the asymmetry of time dilation. Someone moving in a rocket ship will be younger than the person staying behind. Isn't their relative acceleration

There is also the asymmetry of time dilation. Someone moving in a rocket ship will be younger than the person staying behind. Isn't their relative acceleration the same though? Why is the rocket man privileged in staying young? This kinda works if you imagine a grid of sand particles being acted upon by either gravity or traversed by the rocket. The rocket traverses many more grids than the person standing on Earth. The person floating in naked space will traverse the fewest grids. The kicker is that there is no place in space with zero grid traversal. Accounting for all grid traversals becomes a nightmare.