I think it's a bit of a stretch to say that WL promoted those theories.
Clearly if you watch the full statement Assange makes, he's simply establishing a universe of possible sources of the leaks. Statistically, a disgruntled employee is significantly more likely to attempt sabotage than many/most of the other explanations being floated at the time.
Also, FWIW anyone can weaponize a system like Wikileaks, and we should reasonably expect that to be a major source of the leaked data. But keeping in mind that WL is something that can be weaponized, there are many different attacks that can be delivered through it.
Clearly if you watch the full statement Assange makes, he's simply establishing a universe of possible sources of the leaks. Statistically, a disgruntled employee is significantly more likely to attempt sabotage than many/most of the other explanations being floated at the time.
Also, FWIW anyone can weaponize a system like Wikileaks, and we should reasonably expect that to be a major source of the leaked data. But keeping in mind that WL is something that can be weaponized, there are many different attacks that can be delivered through it.