You'll get a lot out of doing it that way. The "theory" you mention here is a mere parody of responsible research, depending on mining factoids from legitimate researchers and making fantastic claims about secret societies which by their very nature can never be verified. In Robert's own words from the OP to this thread, these are his claims:
I am sure (and have much supporting evidence) that the musical career of Mozart was almost entirely manufactured, falsified, even from the time of his childhood onward by the fraternities of the Holy Roman Empire, this involving the supply to Mozart (even after his death in 1791) of music he never composed but which, being published and performed in his name as 'evidence of his genius', eventually, led to a Mozart-dominated musicology, the hijacking of historical reality, the destruction of musicology itself, and the control of what is taught and believed on music in this important period of musical history. The musical evidence (from manuscripts etc etc) is now very clear. And other researchers are increasingly agreeing with this view.
You may notice that the "theory" is put forth by delegitimizing mainstream Mozart scholarship (which he calls "corporate mythology" and "a fairy tale") as well as indicating what the theorist claims are
anomalies in the conventional Mozart narrative. This is the exact opposite of how honest research is conducted: one can't dismiss the work of a Mozart scholar in one breath and then use his work to support a point in the next. Furthermore, weaknesses in the conventional narrative can't be considered support for any one alternative narrative. But by making people concentrate on these perceived anomalies, the theorist may distract observers from the fact that he isn't actually presenting evidence to support a coherent alternate scenario.
A recent item this theorist has presented demonstrates the futility of this methodology quite well. He presented a quote from Abert's adoring biography
W.A. Mozart. Out of this 1500-page biography, Robert
discussed these two sentences at great length:
"An enterprising publisher in Berlin, Johann Julius Hummel, claimed that, although unmusical, he could cast a critical eye over the works that were submitted to him and see whether they were worth publishing. He did not have a good word to say about Mozart and even boasted that he had returned several of his works as unpublishable"
Now in the context of the work, it appears that Abert was discussing the reluctance of certain entrepreneurs to publish Mozart's works, since these virtuoso compositions weren't big sellers. But the theorist wants to make you think that it means Mozart was a talentless fraud who couldn't compose anything without the aid of shadowy cabals and the composers they employed as Mozart's ghost writers.
However, does this factoid even support the point he is making? The assumption seems to be that the works Hummel rejected were works the noncomposer Mozart wrote himself. But didn't Mozart, according to the very theory being put forward, have a stable of ghost-composers doing all his work? If truly talented composers were writing works for Mozart, why would anything he submitted for publication be considered substandard? Why would the plotters behind the Mozart myth allow Mozart himself to try to publish works and jeopardize their scheme?
And if the factoid were truly damning, why would Abert (being in the "fairy tale" game, after all) have mentioned it at all? Are we supposed to believe that the writer who lavished such admiration on Mozart's life and work (on page 239, Abert says "Mozart's genius...towered far above all his predecessors") is admitting in this anecdote that Mozart couldn't compose?
This is what's called "cherry picking." The theorist delegitimizes mainstream Mozart scholarship, but takes isolated factoids out of the context of this scholarship and pretends they support his claim.
Is it true, as Robert claims, that "other researchers are increasingly agreeing with this view"? Of course not. Researchers may well deplore the amount of exaggeration and distortion in popular Mozart biography. They may acknowledge the influence of other composers on Mozart. They may admit that some of his early works were attributed to Mozart by mistake. However, none will support the claim made in the OP that
Mozart didn't write any of his work.
Regards,
Istvan