I was not making a global claim about ethics; I was defining what makes an activity a hobby. Saying "for hobbies the primary purpose is enjoyment" doesn't assert that pleasure is the sole good in life -- it simply notes the internal aim of leisure activities done for their own sake. That aim can coexist with other goods (skill, friendship, health, meaning) and the fact an activity fulfills its own goal means the time isn't "wasted" even if no external output results.

Enjoyment here is a sufficient justifier within that domain, not in a life-wide philosophy. Labelling it "hedonism" is a significant overreach.