High precision Dive bombing was made obsolete by guided ordnance, but did the URSS have any in 1948? They were also far behind in the development of modern gunsights, the best they could obtain being possibly some late war german design (like the computing gunsight of the Arado 234) or western designs scavenged from lend-lease planes. Hence why they could be interested in keeeping alive that practice, at least till they could develop better alternatives.