Did you know that the word hobby comes from marketing "hobbyhorse", meaning a toy horse that children can play with?
In my eyes, the word hobby is a derogatory term for that which makes us grow. It is a word to push down our lusts and encourage us into doing something "more useful".
On the other side, we have the word mastery which has the opposite effect. It is a word that is often applied to juggling or acrobatics. A word that puts a coat of honor around that which makes us grow. Mastery has the negative effect that it pushes people away from learning it.
It is often said that "you need 10'000 hourse to become a master in anything", and this saying reflect the status of the word. This word gives the impression that you have to spend 10'000 hours before it is worthwhile. This looks away from the fact that these "masteries" often are fun throughout the journey of becoming a master. The process isn't just labour, it is also significantly marked by a joy of growing.
We should not use words like hobby or mastery. They are both rooted in honor culture.
We should instead use words which has an image of plantal growth. I personally call my juggling and my chalking for different growths. This would weed out the negative effects of these words and relight us towards words that makes us grow; All of us.