ultimately there's just the absolute subject - you are that.
you watch the movie. the movie has a character living in a world. but you watch the movie which is character+the world as one.
the POV experience of the subject looking at objects is known subjectively. you are this knower - ultimate subject. singular. one which unites the rest into one thing: MOVIE (character+the world) as opposed to two things: character AND/IN the world.
You just answered your own question. If my highest priority is the journey of discovering truth, then happiness has no more relevance than sadness, anger, frustration etc. If I start off a truth journey with an idea that truth is only to be found within happiness, then I have already failed, because I am not open to searching for truth within sadness, anger, frustration etc. I’ve failed before the journey has even begun.
Someone that seeks happiness, security and comfort is not oriented for a journey and exploration of the totality of truth.
It’s great to be so open-minded to be willing to search for truth in eternal hell, yet I would be cautious about setting up a limited construct. Above, we’ve already made an assumption that society imprints false beliefs upon us. We have therefore blocked ourselves off from seeking truth within societal imprints. Perhaps there is truth to be found in both hell and societal imprints.