[olde north church]

actually, yes, it does.
In a pure Darwinist society, people who had juvenile diabetes would not have children. Prior to clotting factors becoming available, how many hemophiliacs were able to have children?
Stop to think about the impact of Albert Schweitzer(?) had on AIDS, Ebola, Marburg, etc.

[r9etb]

In a pure Darwinist society, people who had juvenile diabetes would not have children.

Hm. Perhaps if you knew facts instead of opinions, you'd understand that the vast majority of new diabetes cases are in families where neither parent's family has a history of it. There's certainly no such history in either my or my wife's families -- nor is it the case in families of other diabetic kids I know.

Perhaps a bit of research would do you good.