And that means what exactly? What is the basis for such statements?
While agreeing with your overall gist, I would like to add a couple of points.
The US cannot put in place a contract with the UAE where it singles out Pakistan to not be able to send its pilots to fly the aircraft. That is the sole decision of the government of the UAE, the sovereign, in this contract of ownership. The US can always put clauses like in order to avoid the ToT or pilfer, "no" foreign personnel can tend to the aircraft. In most cases these clauses are not for the life of the asset.
Secondly, contrary to continous cycling of rumors of Pakistanis being needed to fly, the facts are quite simple now. They start with the point that UAEAF has enough qualified pilots and instructors on each of the types they are flying. They do not need foreign pilots to fly their leading combat edge. Do we really think that in a country as large as the UAE, they cannot find enough pilots to maintain a 1:3 ratio of pilots on a fleet of about 120 aircraft (Blk 60 and dash 9)? The Emeratis take pride in flying and they are taking some of their best and putting them through very expensive and exhaustive training. In addition, they have invested a lot of time and hours on pilot training by having their folks repeatedly attend MNExs and with ATLC inaugurated at Hafra, they are doing a lot of sponsoring around the joint training. So they have a good structure in place to cater to their own needs around training and growing their force.
Lastly, Pakistan is not that important in the scheme of things for countries like the US and UAE to put a specific clause about prohibiting it. Its up to the UAE. If they need pilots they will ask the GoP (its all up to them, not up to the Amreekis and not up to us Pakistanis). Like the PIA of the past helping stand up Emirates, the UAEAF is a self-run, independent force now. They do not need PAF pilots to help them any longer and PAF is perfectly fine with that.