One man, single-handedly fighting the declining birth rate in Japan.
Questions of morality aside, he could probably help others too, finding multiple woman who not only like you but are fine with this kind of setup is quite a skill many would like to learn, I’d assume.
Who cares? Just like most things your average programmer relies on, they are written by smarter or at least more specialised people to make your job easier. They have learned to write memory-safe code so you don’t have to.