There’s the saying of you never know whats going on behind closed doors. Also, how long is it before an abused woman actually manages to get out?
“They were a lovely family I'm honestly shocked. Lance couldn't do enough for you. He helped me with DIY in my house, did his all up from scratch."
Both of these. That's why we have sayings like, "Street angel, house devil". Janus doesn't begin to capture the essence of these people.
And, for many people, there's a very low bar for being a good father/partner. There are lots of threads on AIBU and Relationships at present, describing egregious acts but asserting, "Apart from that, he's a fantastic husband/father".
There seems to be a poverty of imagination about what it means to be a good husband/father whereas there is an unmanageably high bar around what it is to be a good wife/mother. And this affects the coverage of these wretched tragedies. (In the case of the men with depression, I wonder how many of them steadfastly refused to seek or accept treatment - never understanding the risk they pose to the wellbeing and safety of others (in extreme instances).)