That we vastly over estimate how happy success will make us, and how miserable illness and failure will make us. That 6 months after winning the lottery or becoming paraplegic people self-report being equally happy with their lives compared to before. That people become happier when stuck with a thing they can't change, than they do with a thing they feel they can change. That we don't know this about ourselves makes us make choices that make us less happy overall. And that these are surprising results is the reason the talk is worth watching.
Thanks, I take no offence and I understand your intention here. It is important to understand that suffering and happiness are not mutually exclusive, and for some people the intersection might be larger for where happiness intersects with suffering than for happiness or suffering by themselves.
Of course, as I've gotten rid of stuff I don't like and replaced it with stuff I do.
As a hunter-gatherer, though, I wouldn't have such options.
The idea that, if you were a hunter gatherer and didn't have options you would be less happy is the what the talk and the described research is calling false; instead we demonstrably adjust to become happy when faced with no options, which means people like what they have more than they predicted they would not just because they got to choose it, but even if they couldn't choose it.