The shortened distance signifies the instant end to the wielder's life.
For the wielder to use this skill on himself, he has to die. Dying can simply deduct a person's initial strength by half.
Walls of Sequence simply preserves the soul and recreates the body...
Aaron did not want to jump into Road's End: Walls of Sequence because he already knew the consequences of using this skill on himself.
Definitely, he would get rid of the seed implanted on him and he would also be able to kill Yu Chen. He would also be recreated anew.
But, his stats would be halved permanently.
If he is able to use 100.00% of his strength now, after using Road's End Walls of Sequence, he would only be able to use 50.00%.
This is the risk involved in getting himself free and Aaron did not dare try it.
He would definitely regret the action.