Like because it was HOT???
The climate wasn’t like that until long after the migration began.
What I find amusing about so-called ‘scientific’ research about the ‘migration out of Africa’ is that it ignores, ostensibly for PC reasons, the fact that those that migrated were decidedly ‘different’ than those who remained.
Telling, imho.
And you can’t grow food in sand. Sam Kinison said it best: ...””Get out of the desert! You live in a ####ing desert! Nothing grows out here! Nothings gonna grow out here! Come here you see this huh? This is sand. You know what it’s going to be in another hundred years from now? It’s gonna be sand!...””