Why do Wuzhou people (Guangxi) like to pretend to be Cantonese?

I think it's because I can speak Cantonese. I'm from Wuzhou who speaks Cantonese. First of all, there are many branches of Cantonese, and Cantonese does not mean Cantonese. Many people speak Cantonese from Guangxin, which is now the Guangkai generation in Wuzhou, Guangxi. As for authenticity, I haven't studied it too deeply. Many people in Wuzhou are Cantonese, many local people go to Guangdong to work, and it used to be an important business hub, so it is normal to speak Cantonese.