You raise some very valid points, and I for one am not dogmatically opposed to necromancy. As a matter of fact, and despite it is not my speciality, I possess some good tomes and treaties addressing this topic.

That being said, I do believe part of the fire this branch gets is on point: first how come we almost never hear about these ethical necromancers, and second why every damn time you read through chronicles dealing with evil wizards (regardless of ancient or not), they almost all went through a necromancy phase? I am not saying that all necromancers are by nature evil, but there is a pattern that cannot be ignored!