I've gotta say... 10BP for what is essentially a Special Snowflake Tax on a backstory decision that has no mechanical effect, except in the most incredibly long-running of campaigns, is absolutely ridiculous.
This is especially true since, while we know the "average" lifespan of an Ork is lower than a human, that piece of information is absolutely useless in practical terms since we have no clue what the spread is like on a Bell Curve. One Standard Deviation could be +/- 30 years for all we actually know about it.
Enforcing it as a 5BP Quality could be justified... barely... if you know, up front, that the campaign is going to be several decades of in-game time. Otherwise, since there's no aging mechanics, all you're doing is penalizing people because you've got a bug up your shorts about how Orks are balanced.