In reality, Liu Bowen voluntarily went to his death.
Ever since Zhang Qingwu became the Heavenly Master, the Ascension Road, which had been continuously reinforced, sealed, and solidified by generations of Heavenly Masters, was open to him. But the open Ascension Road wasn't to let him become immortal; rather, it allowed him to stand on the Ascension Road at any time, letting those about to become Immortal leave.
Or to kill.
Actually, after the era of the Immortal Court, the vast majority of those who could become Immortals had, to some extent, come into contact with the relics of the Ancient Gods or had intricate connections with them. Otherwise, under the premise of generations of Immortal Masters sealing the Ascension Road, almost no one could find the correct Ascension Road.
Only those who have personally encountered those mysterious existences can sense the road to their embrace.