I could be petty and point out that we don't know they're immortal, we only know they are extremely old... but that would be petty
So instead I'll point out:
1) People have holidays surrounding them all the time. Heck, so do events. That doesn't mean they're gods, it just means people LIKE them.
2)[Censored for pettiness]
3) They move the sun and moon. That's IT. We don't even know if they're the same sun and moon - ie, a massive ball of gas and a massive ball of dust. Episode 1's 'stars shall aid in her escape' sequence pretty much proves the stars aren't suns. Heck,
ordinary unicorns used to raise the sun and moon.
... I think i've switched points mid-argument again >.>
She serves the functions of a monarch. There's a difference. People swear by monarchs all the time. Didn't someone make that point already?
"By god"
"By george"
etc etc.
Oh, i LIKE it. And it's a reasonable piece of fanon. I just don't like that, apparently, someone thinks it's canon. Because it's
not.