“Mosta y’all ain’t goin anyway....” I once heard a brilliant Christian physicist, the late Ulrich Jelinek, from GE speak on the Plan of Salvation. He said the Gospel is for “whosoever will”. He said that only approx. 6% of the world ever have or ever will accept Christ. And before God ever made a grain of sand, He KNEW how many would, and how many would NOT believe it and receive it and be Saved. He knew that approx. 94% would go slurping down the drain. And God went ahead and did it anyway. FWIW.
However "brilliant," he'd better have some fancy footwork to explain such a precise figure. I believe the old saw is true: Christ would willingly have sacrificed Himself for just a single person. And He did indeed foreknow who would believe.
That 6% figure was far more tenable statistically a century ago, when worldwide numbers of true Christians (Bible-reading, tithing, mission-supporting) were 2% or so. But the Holy Spirit is on the move! Africans and Asians are converting by tens of millions, and 20% worldwide is the current level. Some are predicting the Rapture once we reach a third.
Noah kept preaching for a 120 years all the while knowing that he was building an ark that would only hold only eight people. We are called to be faithful in doing the things God would have us do and trust in Him with the things we don’t understand.