How much you wanna bet Marigold’s suggestion of what they do today was “have a dance contest” and is trying to get her way by virtue of Phoebe going along with “the way unicorns do stuff”?
I read Marigold’s comment in panel three before anything else and momentarily thought is was taking place in a parallel reality where Phoebe was the unicorn and Marigold was the human.
The meaning of life is to exist in transcendent beauty, and unicorns are the best at it.