Why is the fierce battle between Taiping Heavenly Kingdom and Xiang Army just a chaotic struggle between Jianghu gangs?

When we were studying history in middle school, we all knew about the Taiping Heavenly Kingdom Movement. However, some people say that the fierce fighting between the Taiping Heavenly Kingdom and the Xiang army is just a chaotic battle between gangs in Jianghu. Why?

The first is the composition. At first, gangs were not allowed to join the Taiping Heavenly Kingdom, but with the deepening of the crackdown, I felt that some people needed support. At this time, the heaven and earth led by Liulichuan will come to join, which is a matter of mutual use. Therefore, Hong Xiuquan also ignored it. After joining, the combat effectiveness has also improved, so he is willing to help them. Zeng Guofan's Xiang army also had gang members, and the lower-level personnel were controlled by gangs. At first, they were hit by pressure, and then they turned a blind eye.

The second is that both sides used gang slogans when fighting. Some take defending our country and defending our country as the slogan, while others take doing good for heaven as the slogan. These are all measures taken by gangs for their own benefit. Wherever they went, although mild, they did not change the habits of gangs. Some people even took advantage of the fire and roared in the mountains. Make a hullabaloo about when you are punished. Is this a gang activity? The war between the two sides is the result of gang struggle, so it makes sense for Zeng Guofan to dissolve Xiang directly after destroying the kingdom of Tian Ping.

It seems that there are rivers and lakes everywhere, but this river and lake is not what we see. Some people say that where there are people, there are rivers and lakes, which seems to be true. Zeng Guofan is also in the Jianghu, and Hong Xiuquan's Taiping Heavenly Kingdom is also in the Jianghu. What do you think would happen if they reconciled and rebelled against the Qing government together? Will it overthrow the rule of the Qing government?