OP i also want to add that the changes of the seasons are weakness in the FE model, not a strength.

I understand that you like the tropic of cancer / capricorn argument but i have to ask
A what moves the sun in a circle?
B what changes the circle?
C what is in control of the timing of such rotations or changes in the width of said rotations

from where do these force inputs originate?

secondarily, in the absence of a revolving horizon line (shadow line) what causes the difference between night and day? instead of seeing the sun get larger and larger like a star approaching in the darkness and bringing daytime with it as it travels, instead we see a sun "rise" (they've unironically called it that for thousands of years)
you can literally see it climb past the horizon, overcoming the shadow line to spill light into previously dark regions.

without the shadow line of the horizon, how does the sun know where to stop shining?