It's about the American Dream.
A converted native, a petty criminal, an indentured servant, a free colonist... What do they all have in common?
They all lack a trade.
Once ANY colonist acquires a skill/trade, they gain equal status in the colony. It doesn't matter who you're born to in America - it matters what you do, and I feel a Neil Diamond song coming on.
Anyway, as far as clearing their status to be soldiers, once they've proven their worth as equals in the Colonial economy, why wouldn't they then be able to fight as such, either as Expert Farmers or giving up their livelihoods and fighting as Free Colonists? Hasn't their (even perhaps brief) stint as a colonial specialist granted them equal rights?
OUR history is full of denials of native/ethnic rights. Do we HAVE to follow that in a game *based* on our history?
Maybe we can choose to convert the natives, accept them as equal citizens and Seasoned Scouts, and enlist their equal involvement in our shared struggle for freedom against our tyrannical European overlords.
I mean, you CAN brutalize the natives, if you like.
Just sayin', you DO have options in the game.