According to the world's legend of Sun Wukong, he values affection and loyalty greatly. Perhaps at that time, he wouldn't even have to act and could let Sun Wukong take his own life.
It was Sun Juekong in his eyes, after being severely injured by Sun Wukong once, he was still quite apprehensive of Sun Wukong's strength.
But Sun Juekong thought, he was only there to kill Sun Wukong, not to compete with him. It was really unnecessary to go all out against him, as long as the goal was achieved.
As for a direct confrontation with Sun Wukong on the East Sea.
Such a thing would not be done by him naturally.
Not to mention the Ancestral Dragon presiding over the East Sea. If he truly took action, the Ancestral Dragon would definitely not mind capturing him.
Being one of the top ten powerful beings of The Primordial, if the Ancestral Dragon intervened, Sun Juekong's chances of escaping while fighting Sun Wukong were not great.
This kind of risk, he naturally could not take.