In the fields that concern philosophy, psychologoly and art however there's a lot of sham involved.

I see two possibilities: (1) these fields are by their very nature shams and no amount of jargon or other cosmetic can cover that fact, or (2) what is being discussed is authentic and the jargon just helps in the communication (as I suggested), but what is being discussed is distasteful or unworthy of discussion in the view of the outsider.

Ceci n'est pas un seing.