very true.
The Uzamaki's were known as "Friends". that's what the clan's symbol meant at least.
I think the Uzumaki clan had the sealing techs of the sage, as well as some of the space-time jutsu. On top of that, the Uzumaki were a branch of Senju that specialized in being able to seal things, and in bringing non-specialist ninja into a bloodline.
Bloodlines were a big thing, back in the day, so if a bloodline could have a bloodline member with anybody on the street, that's a pretty strong bloodline. This is mostly spec. on my part, but the name of "friend" suggests that there was something going on between the Uzamaki and everybody else that allowed them to use that symbolism, but it's unknown at this point what that ability is.
Again... i'm not right tonight. now is not the time for me to be getting into this.