Originally Posted by
Teriz
Except the lore specifically states that Vindicators are a type of Paladin, and Paladins are champions of the light. No where does it state that the only type of engineers are the profession based engineers. This is also backed up by the fact that Tinkers exhibit abilities not found in the profession.
Since HotS abilities are in WoW that does make it relevant to the discussion. We have engineer-based characters utilizing the abilities of hero characters. Traditionally (frankly every single case), those hero characters and their abilities form the basis of WoW classes, which explains why they're not in the profession.