It does in this case since these objects have been deemed 'culturally significant' by historians. Their preservation is therefore important.

I'm not implying that these tribes are stupid or incapable of taking care of these objects. I would hate to see irreversible damage done to these artifacts, especially since their culture has been destroyed enough as is. Care of historic artifacts requires teams of folks with extensive domain knowledge, proper facilities, and money for upkeep. Unless they have a dedicated art or anthropology museum, they most likely don't have the necessary resources. Even if they do have the resources or could get them in the near future, transportation is an issue. Many of these artifacts are fragile. Transporting them to (probably) lesser facilities with the added risk of them being damaged in transit doesn't really make sense. That is, if you care about the cultural value these artifacts have.

Artist here, actual question. Do indigenous tribes have the resources, experts, and facilities to conserve these pieces? Or is it a symbolic gesture and they're gonna stay with UC Berkeley.