The average church lady has just as interesting a story as Harriet Tubman, and has contributed as much to US history.
Yes, Tubman has an interesting story.
But I am sure the boy who tended Ghenghis Khan horses did too!
Tubman is part of an ongoing desperate effort to find significant blacks in US history.
She is a particularly good subject... since almost nothing concrete is really known about her. Thus almost anything can be made up to make her seem larger than life.
But the sad fact is, even if she had John Henry strength and personally carried 500 slaves on her back to freedom while beating off confederate soldiers with a donkeys jaw bone she wouldn’t be worthy of being covered in a US history course. Maybe an in depth course on the civil war might mention the under ground railroad in passing, but a general survey course of US history? no way.