The wisdom of the Council stated it as written. I’ve not read either document entirely. This is how it stands today. Perhaps it has to do with the world”getting smaller”by travel and mass communication: not to mention a Civil War in America; 2 World Wars; Korea; the Cold war. A lot of people of Good will were killed, of all races, colors creeds, and ages... Maybe that’s why. Just a guess.
Thanks to the modernism that has creeped into the Church via Vatican II (and is now full steam ahead), most Catholics seem to think that we can hope that these non-Catholics will be saved. No, we can not.