Wu Jian did not doubt that Wu Meiying had put Zhe Dāozhe up to this. He didn’t know what she had done to convince the man, but perhaps he hadn’t needed too much convincing.
Joining the Heavenly Sword Sect would yield protection for Wu Jian as the sect was renowned for its martial prowess and ancient lineage. Even with the current trouble from the magical beast invasion that hit multiple nations, they were still the most powerful sect.
As a member, he would be granted shelter of the sect’s formidable influence and martial might, which would deter his--and by consequence, Wu Meiying’s--enemies from recklessly pursuing him. The Heavenly Sword Sect’s reputation alone would act as a deterrent, dissuading potential assailants who would hesitate to incur the sect’s wrath. Additionally, the sect’s vast network and resources could be called upon to provide Wu Jian with strategic advantages and secure havens, ensuring his safety against those who sought to harm him.