A number of people on previous threads on this topic have expressed themselves in ways similar to what you’ve expressed . If you’re interested and haven’t done so, you can look these topics up on the Search function and see the views that have been posted.
Some of the discussions have been lively!
Of course, that’s a view that each of us can choose, or not choose, for ourselves. Responses from some people of the extinguishment at final nibbāna view is: it’s our clinging to a self-view that expresses itself as a fear of, or lack of attractiveness, to extinguishment; the drive to exist in some way, bhavāsava, is very strong. Again, if it’s only dukkha and not a self that’s being extinguished, then what’s the problem?
Again, this is not being offered to try to convince you or anyone of what the “correct” answer is. But the teachings in the suttas make it clear over and over that all conditions are inherently dukkha, that all the khandhas (including consciousness) are anicca, and that the khandhas end without rebirth, when an arahant passes away.
The ending of rebirth, being integral to the Buddha’s teachings in the Nikāyas, importantly separates it from death as spoken about by materialists – who deny rebirth. If an un-awakened being keeps being reborn, having to experience dukkha over and over and over again…then the final nibbāna of extinguishment is, as the Buddha says, the highest “bliss”, (AN9.34, MN43, MN44, SN36.11, and MN59 - "…when a mendicant, going totally beyond the dimension of neither perception nor non-perception, enters and remains in the cessation of perception and feeling. This is a pleasure that is finer than that.
Idhānanda, bhikkhu sabbaso nevasaññānāsaññāyatanaṁ samatikkamma saññāvedayitanirodhaṁ upasampajja viharati. Idaṁ kho, ānanda, etamhā sukhā aññaṁ sukhaṁ abhikkantatarañca paṇītatarañca.
But, again, this is offered only to help clarify this view and understanding of final nibbāna, as understood by a number of Dhamma practitioners.
Happily, as we know, these beautiful qualities are cultivated and manifested in all sincere Dhamma practitoners. And, as in Iti44, while an arahant is still alive and the khandhas are still present, (nibbāna with residue), they are naturally expressed through the manifestation of not only wisdom, but all four Brahmaviharas, including kindness, goodwill, and compassion, that extend to all beings. Even by those who incline towards the “extinguishment is bliss” view.