The protagonist needed to break the statues of the memorial to enter the Abyss Alter Area illegally in the game.
But Jareth doesn't need to do that.
In the first place, the only reason why the protagonist didn't trigger the self destruction ability of the entrance was because of his plot Armor in the game.
There were no explanation given why it didn't trigger when the protagonist tried it, but Jareth is sure that if he tried it then he will definitely trigger it.
Jareth could have still entered illegally but he already knew that he could just take the token from the president so there was no need to be illegal about it.
He can just access the entrance in a proper legal way so there was no need to destroy the protective barrier that might help in blocking demons in the future.
The bald man lead Jareth towards the basement and then placed his hand on a certain part of the wall causing a hidden staircase to appear.
