Regardless of your opinion of ALPA, why are valuable US taxpayer funds being used to fund a pre-clear in Abu Dhabi?

Will customs and immigration lines in the US be significantly reduced by instituting this pre-clear? There's very little travel between the US and Abu Dhabi, so, unlikely. The US agents sent to staff this post will cost more than they would had they processed these passengers in the US too.

I just don't see the reason Abu Dhabi is deserving of a pre-clear. For those on this forum who are supportive, please explain why Abu Dhabi needs this or is deserving of this (other than to politically pander to the UAE, of course).