The committee chairs, just as board directors, are free to have their own opinions on issues. It doesn't automatically imply that it is the policy of the Foundation. Just as forum members here disagree and debate, the members of the Foundation have similar disagreements and debates.

Also, it is not detrimental for the Bitcoin Foundation to have an office in the US and it does not have to be the only office worldwide. Remember, the Tor Project is a US-based nonprofit as well, because jurisdiction for a nonprofit is not very material.