Zhu Bajie's understanding of his role has always been very clear, which is to loyally follow in his master's footsteps.
As for whether the master is right or not? That's not within Zhu Bajie's consideration.
After all, firstly, following his master, he can learn the skills of courting women!
Secondly, his master's wisdom is unparalleled in the world, and by following him, Zhu Bajie need not worry about being deceived or manipulated.
Thirdly, by following his master on quests, he can rapidly enhance his cultivation level and even obtain many treasures.
Though Zhu Bajie might not be very clever, he is wise in his simplicity, realizing that holding tightly to his master's golden thigh is more effective than anything else.
Therefore, he has transformed into Jiang Liu's loyal fan.
Some might say that the supreme treasure should belong to those with virtue. Well, in Zhu Bajie's view, among all these people present here, whose "virtue" can surpass his master's?