Most people don't choose reincarnation. Reincarnation finds their way to them. Perhaps they did something great in their life. Or maybe truck-sama wasn't looking where it was going. But without fail, those who reincarnate are destined for something great. A new life where everything changes for the better. But... Reincarnation isn't always the greatest thing. Sometimes you just draw the short end of the stick. Di Tou just happens to have drawn the shortest stick. Pulled out of his life randomly. Taken by a crazy old eccentric man not as a disciple, but as a body double?! And a janitor body double no less?! Grasping a system to find... It's a JANITOR SYSTEM!? Truly, how unlucky can one get?
In any case, acting too familiar and courteous would also cause trouble and lead the other party to feel like he had other hidden intentions, and although Di Tou didn't like looking at the world through the lens of cultivation levels differentiating one's status, creating a situation where a Golden Core cultivator wasn't 'qualified' to speak to him, he also understood it was just a part of this world's social structure.
Just like Earth had divisions by nationality, wealth, and cultural upbringing, the differences in cultivation styles, factions, and cultivation levels were natural social structures here. To act like they didn't exist would cause one to be an oddball, which inherently wasn't wrong or a bad thing, but right now Di Tou was looking for stability and was going through a negotiation process, so the last thing he needed was random variables and troubles to shoot up.