Fyi: you can edit comments.

The only person bringing up dual family homes is you, it's well known that a two parent home is statistically a far more stable environment for a kid. Plus it's harder for one parent in a two parent home to get away with abuse without the other finding out.

We're talking about single mother and single father homes, because those are more directly comparable. There are a lot of single mother homes, and relatively few single father homes. The stats above therefore make it difficult to make any assumptions about who is more likely to abuse kids.

Clear?

When NASA wanted to put a man on the moon, they should have called you up with how far you're reaching here.

He's just saying to make proper sense of these numbers and the relative risk individuals pose you also need to consider how often they have access to the kids, nothing more.