Wilkis didn't hide his momentum.
No, it would be better to say, he couldn't hide it.
Being a newcomer to grade five and being so strong at that, he struggled to hold on to his aura and hide. So when he moved, people would feel oppressed and those strong hundreds of miles away would feel his movement, causing them to look in his direction.
If Wilkis was given more time or reached a higher realm,he might have been able to hide. But knowing his limits, he didn't force anything. If people are going to detect them, let them do it.
He was someone that had long ascended the need to play politics or care about those weaker than him. So acting unscrupulous was normal for him.
Though the other reason he ignored the warnings and messages sent his way while flying was also simple.
The place he was moving, they might become suspicious and plan ahead some contingencies once they become aware of his arrival. Which he didn't want to face.
