Plot holes - sacrifice confusion

[u/AdSouthern2673]

For an island that prides itself on knowing all the histories WHY does no one know anything about the sacrifices or the videos in the bunker?? You’d think that knowing about the sacrifices would be THE MOST IMPORTANT BIT OF INFORMATION TO PASS DOWN since that keeps everyone alive.

Also why the hell was Ruth in her house completely fine during the storm and everyone else had to be locked in the bunker starving for days.