There is some overlap. I arrive at my conclusions independently of any group. Anyway to answer your question, these two seem optional and nonessential.
Art is optional.
- Humanism values artistic creativity and imagination and recognises the transforming power of art. Humanism affirms the importance of literature, music, and the visual and performing arts for personal development and fulfilment.
Good enough is good enough. Not everyone needs to be involved with it.
- Humanism is a lifestance aiming at the maximum possible fulfilment through the cultivation of ethical and creative living and offers an ethical and rational means of addressing the challenges of our times. Humanism can be a way of life for everyone everywhere.