I understand the sentiment, although I think considering everyone that is content with their lives to be brainless is naive. People out there do think, we're not special or better than them for being miserable.
I don't blame others for being happy, I envy them. I wish I could be happy. Whether life is meaningless or not, the truth of the matter is that they're out there getting some satisfaction from it whilst we're here suffering in an endless cycle.
Thinking so much about death, purpose, etc, at some point may be the thing holding us back. Others are not as concerned with purpose, death and therefore can relax and make the most of what they have in life. Obviously some of them haven't suffered nearly as much as us but others have and still, are doing fine. It intrigues me and I feel envious.
Questioning things so much, putting so much weight on having a purpose, on whether to keep living, all of these big things that can never get a right or wrong answer...whether this is one of the reasons why some of us may be stuck. Whether questioning so much may be one of the shackles of suffering. Whether striving so much to be happy may be the obstacle to finding contentment.
However, I'm a stubborn hypocrite. I say these things but I can't let go of the weight that these thoughts have on me. One can't simply go back to a place of blissful ignorance once one has felt the importance of these questions. Knowing when to give up and what to give up on, is hard.
On a last note, I always found a bit sad the derogatory "NPC" terminology. Coming from playing videogames, NPCs were the characters that gave life to the videogame world, that would have fun side quests, cute stories, living the peaceful quiet life. Whenever I hear "NPC" it brings back nostalgic memories, I don't think I'll ever see it as negative tbh.