Without coaches picking you will have chapter politics replace coaching politics.
Better that than coaches picking based upon who will give them preferential treatment. Better for officials to be in control of their own destiny and integrity than being controlled by the contestants, don't ya think? The conflict of interest is mind-boggling. You'd never let John Q. Citizen hand pick the patrol officers he wants on duty at a given time. You'd never allow a defendant to hand pick his prosecutor, judge or jury. These are identical circumstances.
Assignment politics can be mitigated by having a uniform, state-wide assignment policy, with tight guidelines for making assignments. Deviations from the guidelines might be possible, but the conditions would need to be clear and compelling, and approved by an oversight group (within each chapter). Guidelines should include criteria for number of varsity assignments per week per official (regular season and playoffs), criteria and procedures for creating fixed crews (for those working in crews), criteria for number of assignments to specific schools, etc., etc.
Officials simply have to be independent of the contestants. Despite the fact that the system was flawed and fraught with the potential for conflict of interest, the previous TASO - UIL system was "OK" during previous UIL administrations, because there was a mutual trust and respect between the two entities. They needed each other (still do), but they let each other do their part at arms-length. The current UIL administration is trying to bear-hug TASO, and it simply must be stopped.