Why atheism always has a burden of proof

[Gilgamesh]

There are several, and they are all implicitly entailed by atheism.
a) The claim that the burden of proof for the existence of God has not been met.
b) The claim that atheism is a more rational position than theism.
(sometimes) c) The claim that theism is irrational.

I don't claim that proof for a god doesn't exist. If it does, it hasn't been shown to me, is all. Still an atheist. (a) is moot, although, (a) isn't required to be an atheist, anyway.

b) is not required to be an atheist.

c) is not required to be an atheist.

Have a good day.