Needing to know isn't subjective, only WANTING to know is. NEED to know things are things vital to the plot and that is irrespective of opinion. Padme's death is not actually ESSENTIAL to the plot in the same way Anakin's fall or the creation of the Empire is.
And as I have said before (and I suspect you have not read the thread that covers all this like I have politely asked people to several times), I DO want to know how she dies, but what I want is not pertinent to this argument, which is not whether we want her to, but whether she actually will. In the world of desire vs. practicality, practicality wins. We have evidence that suggests she cannot die in the film and until that is refuted no amount of wanting will convince me any different.