Good point about everyone inexplicably surviving mortal wounds. I’m still holding out hope that we’ll get an actual explanation of how Oliver survived the fall, but that’s starting to look like a long shot.

Arrow logistics are already messed up

Sara’s important to different people than Tommy and Moira were/is important for different reasons. Nyssa could put her in a Lazarus Pit. She’s not going to do that for Tommy or Moira. Ra’s or Malcolm could do it for some nefarious purpose (Malcolm thought Tommy was weak and unworthy of being his heir, I could buy him not resurrecting Tommy but resurrecting Sara to use her as a weapon, more easily than I can buy this “but Malcolm’s just misunderstood” crap they’re trying to sell now). The people that would want to use the Lazarus Pit on other characters might not have access or might not like the idea of bringing someone back from the dead, potentially crazy.

Death already doesn’t mean anything on this show, because the men who aren’t Tommy can constantly survive what should absolutely be mortal wounds with no explanation at all.