As for the fact that this allowed him to ignore almost all martial arts attacks and have the ability of Instantaneous Movement to wander freely between heaven and earth.
Knowing that he swallowed and refined a whole Dragon Essence and even mastered the God-shining Skill, the difference of whether or not he was in the Seven No Absolute Realm wasn't big.
In any case, it was both immortality and very difficult to kill him.
From another perspective, Ji Tianqi thought that the Da Xuan Royal Family intended for him to spend hundreds of years, or at least a century, traveling around the world in search of the opportunity to experience the Seven No Absolute Realm.
But he actually didn't need to.
Ancient people needed to spend a lot of time to see the endless winds, clouds, water, ice, snow, fire, and thunder. But he was a modern man, after all, who could see these natural phenomena through the internet even without stepping out of his house.