By benefiting from the genocide, I meant that his government benefited from the availability of valuable land that had been depopulated, and that it was easier to enforce cultural erasure and ethnic assimilation after the dirty work of mass slaughter had already been done.

Oh, yes, certainly. If memory serves, Ataturk refused certain minorities expelled during the Ottoman Empire the right to return in some regions, on the account that, while what happened to them was horrible, it would be ‘dangerous’ for them to return amongst simple country folk who still bore those gruesome prejudices. Which is, of course, also horribly convenient for establishing those areas as Turkish-dominated going forward.