Again, I'm not trying to prove that they're a requirement. I'm just pointing out the Tinker's similarities to other expansion class inclusions.
And WotLK was the perfect time to bring in the Necromancer. They brought in the Death Knight with the Necromancer's abilities instead.And TBC was the "perfect opportunity" to bring in the demon hunter class.
Death Knights started with 270 First Aid in WotLK. Nothing wrong with a Tinker also starting with a high level engineering. Like DKs, you would be free to drop Engineering if you so choose.1) So... a tinker class is profession locked? A tinker cannot pick the herbalism AND alchemy professions, for example?
2) The Death Knights never had such a thing. Death Knights are not, and were never "profession locked".
Conversely, the Tinker could also/or simply get a bonus to engineering. Again, this is nothing more than another one of your manufactured dilemmas.
- - - Updated - - -
Other than the fact that the Tinker concept isn't based on a profession, it's based on a WC3 hero (like Monks, DKs, and DHs).