My SIL is a mom-shamer

It's my husband's sister. I have many examples, but what came up most recently really peeved me. She posted a Facebook article about a baby who was in critical condition after the babysitter shook the baby. And instead of commenting about the poor baby, the poor parents, to be aware etc, her commentary was "It's terrible that a lot of parents leave their children with babysitters, I don't get how people do that". Like, shame on the parents (who are devastated, pressing charges, and raising awareness to keep this from happening to others, they don't seem like shit head people)

I'm a SAHM, as is she. We are lucky that we don't need childcare, and don't need to worry that if our kids are sick and we can't take our baby to daycare we won't get paid and might even lose our jobs. And we are both lucky enough to have our moms close by to watch our kids in the event we need to go somewhere. So she doesn't use a sitter. Neither do I. But hello, not everyone has the same circumstances as we do! I'm sick of her posting these things! Especially when she absolutely has her own questionable parenting practices, she's not exactly Mrs. Perfect Mommy herself.

I don't say anything because I don't want to stir up family drama, but it's hard because I'm the type who feels like witnessing asshole behavior and not saying anything is almost as bad as just accepting it. I'm going to stop following her, but I'm just curious who would or would not say something?