I think you understate your actions. Raising decent human beings is something that matters to us all. Saving someone's life is something that means literally everything to those people and their loved ones. It's hard to matter more than that.
Yeah. I meant "not much" with regard to tech/work. I'm just a code monkey/netadmin/sysadmin, haven't done much except keep the gears turning.
WRT to some of those people's lives, I've checked in with a couple of those people years after and they have families and kids now, so that is indescribably-heartwarming to see, but not in a back-patting kind of way, if that makes sense.
You've done quite a lot.