Can't say it's useless. The school requires to open a psychological counseling room, and teachers should hold certificates. It's just the regulations of the Ministry of Education. In fact, it is not difficult for any in-service teacher to study and get a certificate on the job. It is better to get one now, so as not to take the exam again. Something is better than nothing.
Third-level psychological counselor, more professional. This certificate is more valuable.
However, if you have time to take the mental health counselor certificate now, I suggest you take one, so be prepared.