Why Does The Good Go Unoticed?

While laying in my hospital bed this past week, being that the hospitals are so cheap that they only give you basic cable(but that's another story) the only thing that i really watched and that really kept me going was the music videos and that's only because I'm not really a television watcher I'm more of a music listener but any who it seemed as if every time a rap song came on the younger kids knew every word for word hook for hook and probably could even tell you who wrote and produced the song if you asked them but back to laying in my bed, i met this younger girl who grew on me she had to be no more than three (yes I'm a big baby so i went to children's hospital and that's where i stayed lol) but she would come to my room and every video that came on i tell you no lie she knew every word for word. so one day my niece came to visit and she said "Auntie let me sing you my ABC's" so i allowed her to i ask the little girl that was visiting if she wanted to sing hers to me and she couldn't because she didn't know them.
Why is that parents let children engage in the bad such as helping them learn rap/r&b songs and and just ignore the good...ignore the things that will help them succeed in life such as having them sing their ABC'S. i don't mean to sound like an old bitter women but instead of buying Cd's buy your child a leap frog (learning device) help them to move further and better themselves.