That's nonsense. No matter how corrupt the CCP is, it cannot have a stake in all court cases in China. Maybe politically sensitive trials are a farce (arguably that's the case in much of the West too, but that's a different story) but that doesn't make the profession as a whole a joke.
The central government in Bejing doesn't care even a little bit about some property dispute in Henan but there's a local apparatchik who cares or who could be made to care with the right consideration.
This is from my Chinese wife, basically by "joke" I mean its not the top students who are going into it. You don't become rich becoming a lawyer. The top students in Schools join government, become Engineers, do Business, etc.
A lot of what I've seen is that boring small civil and criminal cases (shoplifting) aren't that different in China than they are here.