Dear Sangom ji,
So that means the Tantric Deity is "mind created" and the pariharams are supposed to "remove" the possible "mind created" problems which may occur if the "mind created" worship is discontinued?
Wow this sounds like giving a person a placebo and making him believe that it is a medication that will cure his illness and then when its time to stop the placebo we tell him that we will stop the placebo gradually becos abrupt stoppage will flare up his disease.
The truth is there was no disease to start with..then the placebo was not a medication to start with and sudden stoppage of the placebo would not have flared up a non existent disease but a drama was enacted to divert the mind!
Why dont people actually want to know the truth instead of being led by a roller coaster of "falsehood"?
Because, the "truth" is difficult to pierce into and people live here believing that this world (and Jagat) are for real, that there are "real" gods, that such real gods will do this or that, etc. In the same way, people believe that a Tantric deity is "more powerful" than the deities they have been worshipping so far and so their problems would be solved with more certainty if one prays to the Tantric god. Our friend here also did the same thing but he got the input from a magazine. Sooner or later, as happens with any human being, he may have another bad patch in his life and then some magazine, some acquaintance or some astrologer will likely give an input that his discontinuance of the worship of that Tantric deity is the cause of the new problem. (A very identical situation happened to my nephew and that was when we came to know about his reciting a Tantric mantra!). It is in such circumstances that astrologers, people doing "parihaarams" etc., have a hey day at the cost of the poor, gullible, believer! I felt like avoiding such a situation for our friend here.
Your last para is not completely correct; there was some problem to start with and that is the 'disease'. Again, the medicine was not 'placebo' from the point of view of this world. It is more like a drama enacted in another dimension, if such a simile appeals to you. Also, while one is at Rome, one has to do as Romans do, but it may not be necessary in another country.
I shall try to elucidate in yet another way. A person takes some native nedicine to cure some disease, but this native medicine causes a new problem to raise its head, after some time. Then, something has to be done to cure this new problem and it may be more appropriate to follow the course if something is prescribed in the native system itself. (here, it is not only the body, but also the mind which will come into play while talking of Tantric worship.)
People seeing a cinema are generally happy to see the cinema and comment about it, etc. Nobody usually tries to analyze it further and tear it to bits and pieces such as films, frames, persistence of vision, the phi phenomenon, etc. People are happy with a real Jagat, for which their body has been genetically programmed.