I’m sorry but there isn’t anything remotely wierd about the photo. It’s posed so that their dc’s faces can’t be recognised in public. And that’s fine by me.
When you are raising young children, your life inevitably becomes all about them, so I can understand why they want to record this; it’s a snapshot of the family as they are now.
I think it is in very poor taste of op
and others to comment about a child’s appearance; whether it’s about hair or clothing!
And frankly if you look at this photo and the first thing that springs to mind is negativity rather than wishing a young family well, then it’s time to do something else with your time that’s more positive.