On the other side of the coin, if you have no faith, if you're a devout agnostic or atheist, you may not be concerned with what comes after the end of all things, but consider this -- until everything ends, someone out there, right now, probably thinks you're a prolapse-faced turd charmer. Is that how you want to go out? The world is ending even though you still have two years left on your phone contract, you've got half the money saved for a trip to the Dominican, you were totally going to have some sex next week, and Avengers 2 was probably going to have Thanos and Ant-Man in it. But now you're going to die, plus someone thinks you're a prolapse-faced turd charmer. For fuck's sake.
If you can tie up loose ends before it's all over, you should do so, and that may mean swallowing a big, greasy load of pride and apologizing to people you've wronged. And you've wronged someone at some time, whether you meant to or not. Just looking at the comment section for one of my articles makes it clear that I apparently wrong total strangers every week by tying them down and forcing them to read my articles, which must be the reason they keep coming back to complain and not because my sweet, seductive words have winnowed into their brains and lured them back like the siren's call each and every week to fill a sexy void inside them that is so delightful and so enticing that they lash out in anger as a defense mechanism against all the sexy Felix-fun-time thoughts I make them have. Hey, angry commenter, I like the cut of your jib. Go on, tell me I suck. We all know what your negative comments mean now (I'm licking my lips while I type this, in case you can't tell).
And it's not like the people you're apologizing to are going to be dicks about forgiving you. They're dying soon too, so they have no reason to hold a grudge. Doesn't mean some won't, but then you'll know that person was a dick and you were right to wrong them in the first place and your apology can be hollow and meaningless because fuck them right in their dick-headed ear.