Why can't many southerners understand Degang Guo's crosstalk?

Hehe ~ ~ Southerners have many dialects and generally don't understand Mandarin, so they seldom listen to cross talk. However, Renye Fang has his own "cross talk", which is as funny as Shanghai, and is also called a one-man show. Almost all people in Jiangsu, Zhejiang and Shanghai know it, and it is still active on the stage, like funny people, Yang Huasheng, Yao Mushuang, Zhou Baichun and Smile of the older generation. They interpret jokes and jokes in local dialects, which are suitable for all ages, refined and popular. In fact, this is all related to cultural differences in various places. For example, northerners like to eat pasta and southerners eat rice. However, I suggest that you can also listen to the funny ones, whether they are helpful to the communication in other places and promote each other.