Earlier quoted context omitted.
>> you could be joyful but think your life is worthless > I find this hard to believe. Albert Camus developed the philosophy of Absurdism around a very similar idea. A gross oversimplification is that in the grand scheme of things, logically and objectively our lives have no meaning, but our brains are wired to need meaning. The solution is to create that meaning for ourselves even while acknowledging that meaning is…
I think a better argument is that there is no objectivity to begin with. It's all subjective. If you believe life is meaningless, it is. If you believe there's meaning, there is.
If you believe that there's meaning, and struggle to achieve said meaning, but ultimately failing, or ultimately proven that the struggle was ineffective at achieving said meaning, you will turn bitter and end up unhappy.
If you believe life is meaningless, you will observe that your internal model is correct, and thus be vindicated, if not cynical towards everything.
That's why ignorance is bliss.