I have delegated to some communities but then I learned that this practice was not correct, so I only keep the delegations to the communities that have developed something. Like me, other beginners can fall into these traps but many of us don't have bad intentions, we are actually trying to learn.
Content like this post is very important as it helps us understand in a deeper way. It would be interesting if there was some community about "good practices" on hive, where the more experienced could expose their knowledge and beginners would have safe sources to learn, although some more technical issues may still leave doubts.
About curation, I had never stopped to think about the real responsibility of a manual curator. In addition to the content he tries to see the creator's effort and this requires time and dedication.