The treaties are no more outdated than the Constitution of the US is outdated.  

There is no denying that Native Americans struggle with socially destructive behaviors, but so do non-natives.  All of the things you mention occur all over America everyday among non-Natives.  It just isn't as obvious as it is in a small village.  The rates may not be the same for all those issues, but at in at least two - drug and alcohol abuse - white Americans take the prize.  A significantly higher percentage of white men drink alcohol than any other cultural group, and more of those who do drink, drink heavily daily than any other cultural group.  We just don't see it, and if we do see it, we see it differently -  when we see white street drunks it's a cultural aberration.  When we see Native people in the same condition, we see it as their cultural norm.  It's a false view of reality.

White people, men and women, take more illegal drugs and more kind of drugs than any other cultural group.