The reason is in reality truly straightforward, and Whis has said it some time recently. Vegeta overthinks everything, even the following move that he will do. Hence, he can’t separate his brain and his body. Ultra Sense can’t be acquired by rationale, as Goku beforehand appeared. Vegeta is a remarkable sensible and Goku is very natural.
That is the motivation behind why Vegeta won’t have the capacity to accomplish ultra nature as effortlessly as Goku, who is the change sense of self of the Saiyan Ruler. Obviously, this doesn’t imply that Vegeta won’t have the capacity to learn Ultra Intuition, he simply needs additional time than Goku in light of the fact that his attention to his body isn’t like how Goku knows about his own.