Eventually, Doomsday will come for the world. But no one knows just when that will happen. As the Bible says, "No one knows the day or the hour". It could be in a million years. It could be today. But it WILL occur, because everything comes to an end sooner or later.
Now to the point of this post - a point I have made before: smart people will take steps to help insure survival in the event of a life-threatening event. It does not have to be a world-ending cataclysm. There are mini-doomsdays every day. A tsunami here; a volcano there. And over here a hurricane. If it kills you, it is YOUR "doomsday."
And the best way to survive is to be prepared for as many possibilities as you can prepare for. You are NOT crazy to be a "prepper." You are crazy if you are NOT a prepper.
Wherever I go I carry certain items that help me cope with lesser daily problems - a knife, a lighter, a short piece of paracord - things like that. I call it my "McGuyver Kit". (McGuyver - look him up).
In my car I carry the essentials in case of emergency - fire extinguiser, flares, tool kit, medical kit, space blamket, emergency food bars etc.
At home we have a supply of medical stuff, including masks, Lysol, meds we use, nitrile gloves - just in case another pandemic rolls around like the 1918 Spanish Flu that killed 60 million.
We also have a 3 year supply of foods put away (long shelf life), just in case another famine hits. And heirloom seeds - I keep a two year supply in deep freeze, and I plant some of each every year to keep fresh seed on hand. The reason for a 2 year supply - what if there is a drought the first year and your seed doesn't sprout?
I also keep certain necessary electrical components locked up in those huge aluminum truck boxes (a Faraday Cage), in case an EMP wipes electrical stuff out. With a couple solar panels, solar charger, rechargeable batters, booster packs, short wave radio, two-way radios etc., I can keep basic needs up and running until the power is restored.
Now, I am not suggesting everyone do the same, but everyone should take SOME steps to increase their survival factor. If nothing else, you will sleep better at night.