The tech will miss the nuances of the game, no matter the sport. Yes, we can assume the calls will be fair, right down the line, based on the rules of the sport (and, that would be awesome); but, those little things...the legal beating and banging down low in BBall, or a slightly generous corner in Baseball, or maybe the handfighting b/t WR and DB...tech would be hard to program for the little intricacies that are staples of each sport. I want a fair game called, no doubt; but, I don't want a foul called on every little hand check or bump; a holding call on every single play; a ball called because it was off the corner by an eye lash.
Humans know those nuances. Humans know the difference between pass interference and handfighting down the field. Humans can get better at officiating a game the same way players and coaches get better; the same way anyone gets better at something...practice practice practice...then, some more practice. Full-time officials, umpires, referees...that are held accountable for the game they just called, that answer questions from the press about the game they just called (just like players and coaches), that are punished for poor performance/incentives for quality performance. Make it a year round job, a career. The main thing being...ACCOUNTABILITY.
I wouldn't be completely against tech; but, as I said, those little things that make sports what they are, they would be lost, imo. I don't want that.