Not surprising, really.
Humans aren't made to live under constant stress, like we do these
days!
I'm quite sure God
wanted us to work hard, but not make work our sole focus.
/me quickly prays that
if she's wrong, she won't be smitten by lightning!!
AAAaaaaaaiiiiiiiieeeeeee!!! 
Mental illness can also be hereditary. So, applying the simple
Multiplier Theory from Economics, one Schizo female can give birth
to three kids, all of whom turn out to be schizo... these three
kids end up having two kids each, all also carrying the schizo
trait... that makes it one schizo female with three kids and six
grandchildren, making it one big happy Schizo family, making it a
grand total of 10, yes, 10 gleeful Schizo citizens for us to
support in IMH, or if they're bursting at the seams, which they
usually are, they'll be released, becoming our neighbours!

Mental conditions like Schizophrenia can be hereditary. And yet,
nothing is done to stop the affected females from reproducing. And
you know what, during my attachment at IMH, we realised that a lot
of these females were taken advantage of by men, who get them
pregnant, and then dump them, and these girls end up giving birth.
And then, the cycle continues...