That's not true.
I got my current job through a recruiter, recommended by a saloon member.
I wasn't 100% happy with the recruiter, because they tended to do things that the school should have done, and wanted communication about everything to go through them or be copied into everything, meaning sometimes people weren't on the same page. I might be looking for a new job very soon, and I'm not sure I'd use the recruiter again. Really, anybody should be able to find their own job.
I both looked for my own job, but also gave the recruiter a chance, and using recruiters is so much faster. After a few hours of my own applications, I maybe had 1 or 2 solid job leads, whereas the recruiter had a lot of jobs to hook me up to immediately.
If I want to find my own jobs, I will really need to not use the recruiter unless I need to, to give myself time to contact all the schools / locations I want to, and give the schools time to get back in touch with me.
The appeal of the recruiter is that it's just so much faster and easier, and the pitfalls are quite subtle.
However, the recruiter was at all times honest and trustworthy. My only reservations are with the idea of using an intermediary on a relationship (with your future employer) which is so important.
It would be daft to trust anything a recruiter says, not because they would be deliberately dishonest, but because, they don't know the facts about the school. Perhaps the reason the recruiter didn't lie about the school I went to is because they didn't know anything. They did say at one point that they thought it was a good school (it's not) but I accepted that their opinion had as much bass in reality as a Trump tweet. When looking for a job in China, verify everything as much as you can, whether you're being told stuff by the recruiter, school, foreign teachers there or even saloon members.
I don't have any objection though to the thesis that nearly all recruiters in China are dishonest and unreliable.