While I think this poster was being unnecessarily aggressive and aggrieved about it, I kind of do feel like singling out mothers when celebrating child rearing is actually reinforcing patriarchal norms.
We all know women still do the majority of the job, but that’s something we should be working to change by normalizing dads having a stronger role in their own home, right? There really is no need to be gender specific in celebrating parents who take an active role in their kid’s development.