Both genders should have the same opportunities. They don't necessarily have the same interests.
However misguided, I think people are just trying to reduce the pressure everyone puts on young girls to pick interests that fit into their stereotype. It's a goal you can only chip away at. There's no way to quickly rewire all of our cultural tendencies. Maybe girl-focused STEM toys are a bad idea, maybe not. You could argue that they bridge the gap between what we traditionally pressure girls to play with and what we traditionally pressure boys to play with. Maybe that's progress.
What we really need is an evil mad scientist to use robots to raise human babies in isolation, and observe which toys / roles they gravitate toward over the years.