I would agree BUT 
We see more positive vibes on nostr because it’s really small compared to the centralized social medias. Also, human beings can’t be happy every day by nature! Also, sometimes being more resistant due and sharing your thoughts in negative way might filter out soft people that try to please everyone and everything on internet. The more network will grow the more it will have such behavior. 
nostr:note16uc4f3673vf69v7ledd8x99r9ej2sgfrxg56mqn98yfelq66a05qdkw4up 

 Yes, it will have such behavior, but it won't *incentivize* such behavior - which I hope will make a huge difference!
Personally I don't just zap posts that make me smile; I also zap the ones that make me think and ones that deepen/broaden my understanding of something.
 

 It’s not about zaps. It’s about just tried to explain from the nature prospective. I wish that happiness and positivity will prevail but it’s hard! 

 If I'm understanding you - and maybe I'm not - I don't think positivity will necessarily prevail overall in Nostr, but I think anyone who wants it to prevail in their feed can do that. 

 That’s will be a hard ratio but I hope this gonna be the case 😉