It didn't resemble Yunding Star, where the Immortal Path was severed, and even mighty figures like Yuan Chengmie struggled bitterly to find a way to advance into the Immortal Realm.
But that was the Land of Heaven's Abomination, a special case.
In other places, advancing to the Heaven Building Ladder would allow one to cultivate the Sky Ladder, leading to the Immortal Realm.
As for those Peerless Great Abilities in the Mortal Realm who had not left, firstly, they still needed to oversee their sects or families, waiting for a suitable successor to emerge before they could leave with peace of mind, right?
Secondly, they were Peerless Great Abilities in the Mortal Realm, but what about in the Immortal Realm?
Not to imply they were as insignificant as ants, but in fact, they wouldn't be that powerful, and they might as well enjoy themselves more in the Mortal Realm.
Thus, people from the Mortal Realm naturally held reverence when they heard the words 'Immortal Realm.'