I believe the "lol, so random" aspect is meant to better encompass the ultimate message of the film: the examination of the different responses to an ultimately meaningless universe.

Jobu Tupaki's randomness stems from her despondent, destructive response, which she wields like a cudgel to try to "make others understand".

Original Waymond's randomness stems from an unstructured absurdist response, thinking "if nothing matters, then what's stopping me from enjoying the little things?"

Alpha Waymond's randomness derives from a desperation to cling to meaning. He follows the insane rules of the universe in which he finds himself in order to prevent the destruction of what he cares about.

Evelyn's eventual breakthrough into her own enlightenment is a modification of the responses of both Waymonds: "if nothing matters, then I can decide what matters, and I can use that absurdity to make meaning from the beauty of the universe"

At least, that was my reading.