According to believers in the inexorable damnation of the unreached, how is God not unfair for letting someone be born in unreachable conditions?

It is a fact of history that many unfortunate people have been born in conditions where it has been pretty much impossible for them to even dream of having a chance to hear the message of salvation -- the gospel of Christ -- preached to them. Thus, when death suddenly comes, they have no other option than to die in their sins and in their unreached state. And regarding the fate of the unreached, there are Christians who believe that no other outcome can be expected than irrevocable condemnation, eternal damnation, no hope of salvation whatsoever for the unreached (see e.g. [here](https://christianity.stackexchange.com/a/86219/50422) and [here](https://christianity.stackexchange.com/a/79266/50422)) . **Question**: According to believers in the inexorable damnation of the unreached, isn't it unfair of God to arbitrarily have someone be born in unreachable conditions, where no matter what they do they will never be morally perfect and won't ever have a chance to hear the gospel either? How is it fair for those unlucky individuals to be eternally punished when they didn't even have a chance to repent and receive forgiveness of sins in Christ, as nobody came to preach the gospel to them? **Note**: by unreached I mean "unreached with the gospel", "unevangelized", "unlearned" (see https://en.wikipedia.org/wiki/Fate_of_the_unlearned) .