To all the practitioners, the Earthly Immortal Tribulation was not something fabulous. Once they smoothly underwent it, they would have a wonderful life. Otherwise, they had to face death in their remaining years.
However, every successful practitioner desired for this tribulation.
The reason was that the triumphant experience meant they would be immortal and eternal.
Although the Immortal were experts who shared the same life with the world and they almost had an infinite lifespan, their life would come to an end with the end of an era when the world is destroyed. There is even no need to wait for this to happen because when the Deva's Five Decrepit Phenomena begin to play a part in earthly affairs, many immortals would not be able to carry on with their lives.