I'm sorry, I tried to type out a nuanced response, but there's just a lot wrong with this and I can't really articulate all of it.

Your entire argument comes off very mushy gushy, as if all it would take to fix our society is to "not be racist or prejudiced," like we should just all sit in a circle and sing kumbaya and everything will be ok. I don't know if I'm just misunderstanding you or what, but that's what it feels like to me. If that's the case, then I'm sorry, but your opinion is incredibly naive. I'd love it if that was how it worked, but unfortunately, we're in a position where it will take a lot more than just being a good person or having empathy to correct the mess we're in.

Teenagers that are still going to school every day, living at home, getting their first real taste of legitimate friendship and in-depth social interaction with their peers, etc. generally do not have a good enough grasp on how the world works to fully appreciate this level of complexity and generally cannot contribute as much to the discussion as an adult can. Yeah, they should still be considered in those discussions if they have good, relevant points, but their understanding of how the world works is usually not as well developed as an adult's is. It just isn't.

Also:

Some have it, some don't, some have to be taught, but no child is born racist/misogynist/prejudiced

This is really fucked up to say. People aren't born better than others. Some people just don't "have" it. It's that kind of black and white view that lead us where we are in the first place. This argument is completely ridiculous. It's funny that you randomly call out STEM and then spout opinions that are very biotruthy, as if our genetics somehow contribute to our ability to be decent human beings, which is kind of an appalling opinion to see in a subreddit like this.