They are called primitive because they can't compete economically with civilization, if you don't care about economy that ceases to be a factor. Do you honestly think you are happier than the average Sentinelese? If you were put in their place now you would be but if you were born there? Civilization selects genetically for intelligence and excessive intelligence plays havoc on your happiness, usually.
It would probably be better to be a peak predator rather than a human hunter gatherer, now that I think about it. All pack animals are NPC cucks. Imagine hunting in a group, literally school bully tier behaviour. If you can't kill your prey one on one you don't deserve the kill.
No one has attained perfection either, does that mean everyone should stop trying for it? The closer you get to the real thing the better.
I'd only care if I knew what a wealthier life would be like. If 50 years later we have VR systems designed to neurally simulate all 5 senses as necessary to truly give us total immersion I'd probably look back on today and wonder how people survived without it. Since I'm literate, I can't imagine a life where all I know is what I have observed empirically yet most people throughout human history were quiet OK with that.