Sometime we forget, that is when people complain on Hive, that we are all early adopters of an innovative solution. Some things we try will work really well, others won't and will die away. Sometimes things last for a while and then they system outgrows them.
IMHO, the key is to keep the system distributed and let everyone have a voice in how the overall system is governed and policed. I think @taskmaster4450 you are right in that eventually this may become a second layer problem where communities police their own areas.
For the moment though, Hivewatchers are in my view providing a service we need. They discourage spammers and plagiarism but they will get it wrong some times. Its the easiest thing in life to throw stones at what others are doing. The hard thing is in life is to really make valued contribution that takes a lot of hard work and energy. Hopefully in time we will have a better more scalable solution(s). I also hope that the overall ecosystem eventually supports the better ways of doing things.
This is the power of a decentralised system that we all dream about. It will never satisfy everyone but hopefully over time the good ideas for the sake of the wider Hive community are the ones that good promoted into use.