The thing is, this is likely going to affect their sales to some degree.
As a parent, you may have age lock on your child's account, or search games by rating, or just not know what this game is when asked to buy it but judging by rating.
I don't know how significant of an impact that is, but it's unfair.
I think they've done them a favour in a way. If this was day one then it might hurt them but they're past the point of like 90% of their sales I bet, and now pegi looking like incompetent dinosaurs is just a free second wave of social media exposure