Regarding this matter, Shen Yu indeed has some understanding.
He previously stayed at Fangcun Mountain and chatted with other Immortals.
Ultimately, it was a question of the era.
Before this, nature's spiritual energy was plentiful, the number of Dao Fruits was many, and becoming an Immortal was a very simple matter.
If marriage between Immortals was allowed, it's evident that there would be a large number of Second Generation Immortals.
Every Second Generation Immortal could easily become an Immortal, occupying resources.
Moreover, while Immortals have long lifespans, their emotions often do not, leading to various disputes. As for the few with steadfast emotions, achieving after withstanding heavenly penalties counts as some accomplishment.
However, the following era was completely different.
