You're usually safe with sharks in general. It's your problem if you think sharks are some mega-dangerous animal that terrorizes humanity. I wouldn't entrust a kid, or even a pet for that matter, to a stranger regardless of gender.
Your statistic isn't even about women. It's about mothers. And the study states obvious common contributing factors to it:
The mothers were often poor, socially isolated, full-time caregivers, who were victims of domestic violence or had other relationship problems. Disadvantaged socioeconomic backgrounds and primary responsibility for the children were common.
It has nothing to do with "daycare workers". It has to do with the fact that on average being more disadvantaged and marginalized makes mothers more likely to harm their children. And, indeed, while you're not likely to be killed by your mom, a large chunk of the population does face abuse, from parents regardless of gender (but possibly more by women). I would be scared to be the child of a majority of parents, most parents are abusive even if it's not legally documented as abuse. How you think that's relevant to most women experiencing sexual violence and rape culture being prevalent in society is beyond me though.