why would i
consider this simpler example:
A, B and C are in a line. B is close to A, but C is far away from both.
A............B............................C
A turns on a lamp. It takes 5 s for the light to reach B, that's when B turns on a lamp as well.
A----------B.............................C
Now both light beams travel on and reach C 10 s later.
A----------B==============C
C sees both lamps turn on at the same time. Causality is gone! No, of course it isn't. Only from C's POV does it look that way. Every other POV can see that A was lit first and caused B to light up later.
well done, you’ve debunked physics forever