It seems incredible to me that such a ruler would deliberately - or by omission - suppress the education of his artillery officers and NCOs. What is your source for this allegation? Stein does not mention it at all.
I didn't say that Alexander I suppressed the education of his artillery officers and NCOs.
Paul I in 1798 or 1799 ordered to change the educational programme of the Artillery and Engineer Cadet Corps to the same pattern as in the Land Cadet Corps. The proccess of the change had been finished in the first years of Alexander's reign. The Land Cadet Corps had became the First Cadet Corps, the Artillery and Engineer Cadet Corps - the Second Cadet Corps. This change is mentioned in:
Ratch, V.F., “Publichnye lektsii, chitannye pri gvardeiskoi artillerii polkovnikom Ratchem.” (Public lectures read at the Guard artillery by Colonel Ratch.) // Artilleriiskii Zhurnal, 1860.
Istoriya Otechestvennoi Artillerii. (A History of Artillery of Our Country.) Moscow, vol.1, book 3, 1962.