i had to listen to it a bit more, it's very rambly... just to pick up some of the gist of it...
all of these dudes were practically elite level athletes... probably some of them may have been former military, would be my guess... and this island is dangerous land... i sit here and look to my right and there is a mountain blocking my view to the east that is over 1km tall
there are hidden places and holes all over the place here, and as he points out, the majority of the place is unoccupied, because the terrain is too steep and it is worthless for agriculture or any human use case except hiding
i'm quite sure there is loads of holes and tunnels everywhere, and if a person is out climbing around on this insane landscape, there is always a chance if they are unlucky to fall in such a hole and not be able to get out or to simply die during the fall
notably, the building of the aqueduct network around this island also cost probably tens of thousands of lives over the last 600 years, this is not your picnic location, this place is dangerous af, if you are unsure about whether you can cope with the dangers it presents, don't come here, i beg you
i like it precisely because it's dangerous, and if SHTF that danger is more familiar to me than any invading force