That’s a fun argument, and I definitely see it’s merit, however, the fact remains that whatever you hold as your deepest belief is your religion, whether you acknowledge it or not.
To find out what your religion is, all you have to do is ask yourself “why?” a few times, and you get to the core of your belief system.
Atheism is especially insidious, because by denying that you hold anything sacred, you worship something and don’t even know what it is, making it more harmful, and the holder of the belief more of a zealot.