It's not the genre; it's Star Trek. (Or possibly tie-ins, but there are other lines like Star Wars where I would take a death for granted.)And that makes me sad, because it shows how much genre audiences have come to take resurrections for granted, which totally undermines the impact of death as a story device.
I think it really comes down to how it's told, when I read Wildfire by David Mack, it never occurred to me that those characters weren't dead or that they'd suddenly come back to life.