Happiness, rebirth, and the death of an arahant

I am new to Buddhism and have a question I am hoping someone can answer. My understanding is that realizing enlightenment is universally desirable. In other words, it is considered “better” to realize enlightenment than to not (i.e. if a genie ever offered to magically grant someone the realization of enlightenment, no one should say “no”). When it comes to what happens to arahant after death, my understanding is that Buddha did not give a very concrete answer. I've read a couple of answers such as, "it falls under the category of things that are not known" or "the answer will not end suffering so it is irrelevant” or “arahant are extinguished like a flame”, etc. He did seem to concretely say, however, that arahant are definitely “freed” from the cycle of death and rebirth. And when it comes to what happens to non-arahant after death, he seemed to have a very concrete answer with no hesitation: they/we die and are reborn in an endless cycle of dukkha (suffering). My understanding is that both happiness and sadness are dukkha (suffering/impermanence). But isn’t happiness generally considered a pleasant feeling? And aren’t some non-arahant more happy than they are sad in life? I’m not saying I’m one of those people, but don’t those people exist? So for them, perhaps an endless cycle of death and rebirth isn’t that bad? Life can be net-positive in happiness for some, can’t it? For those people, does it make sense to exit out of this endless cycle of mostly-pleasant life and instead enter....nothingness? The unknown? Become an extinguished flame? I have read that arahant experience “happiness” in an unfathomable way, far beyond the happiness of the laymen. Even if that is true, that “happiness” is only guaranteed for the rest of their current life is it not? After that, even the Buddha is not sure what will happen except that they will for sure not be reborn to experience that happiness again in the next life because they will have been freed from the cycle. If it was just laid out as, “following the eight-fold path will end your suffering in this life” then that would be simple. But then there’s also that added bonus of “if you realize enlightenment, the illusion of ‘you’ will forever be nothing.” But what if I’m not suffering all that much? What if I have a pretty peaceful, happy life? Does it make sense for me to say “yes” to that genie? Thank you in advance.