But, with the same mentality, if a player wants to use a nation in asia as a nation akin to western empires, with the same ideology as western imperialism, why is he stopped from shedding the asian skin and fully embrace western technology?
Obviously the Emperor/Shogun stops you.
It's a fact that Kangxi emperor in the later years of his rule actively tried to supress technological development, because there are no external threats, only internal, same with Japan.
Kangxi did arm his troops with fire arms early on, but when it became clear that neither the Mongol or the Manchu banners knew how to use them properly, he tried to stop it, though he did it very cleverly.
For example, his advisor Ferdi once boasted about the quality of cannons made in the homeland, one of the Han mechanics easily replicated what he described. He held a personal grudge against the man and Kangxi used this to stop further cannon development.
Later on another man brought copies of MIC Kalthoff repeaters for his consideration, he secretly disposed of them. Kalthoff were amazing weapons at the time, but because of the production difficulty it wasn't practical in Europe, however mass producing them was not a problem in China. Again because his Manchu/Mongol banners would not be able to use the rifles properly he stopped it.