Yes, agreed. If there would not have been 3 stationary cameras covering the area, I wouldn't have even thought about it. But now we can have zooms of the tanks and a much closer view of multiple things on the site. Granted, the PTZ will be missing other captures, but it already misses a bunch because a PTZ just doesn't have a wide field of view anyway.You will miss important captures if you have it scanning all the time.
More fixed cams are most always better than an PTZ, PTZ has a high likelihood of looking the wrong way when something happens.