Sam has never experienced true loss in these movies. The closest Sam has ever come to losing someone significant in his life was in ROTF with Prime's temporary death and Bumblebee nearly being executed by Soundwave in DOTM. The actual deaths of Ironhide, Jazz, and others never really impacted him to the level of a Prime or Bumblebee. I'm of the opinion that Starscream should've killed Sam's parents. And I don't mean this in a sense of killing them off because they're annoying. This would've added even more significance to their fight. Come to think of it, not very many human characters have died in these movies (not counting random soldiers and citizens), save for Deep Wang, Colonel Sharp, Fig, that other soldier from the Scorponok attack, and Dylan. And out of that list, only Wang and Dylan are of any actual significance (well, Wang's significance is probably debatable). Thoughts?