Can there be any viable substitute for patient and persistent practice of self-investigation and self-surrender?

As I wrote in the introduction to my previous but one article, Is it possible to have a ‘direct but temporary experience of the self’ or to watch the disappearance of the I-thought?, in which I adapted a reply that I had written to a friend who had asked about a portion from 13.31 to 18.04 of a video that David Godman made about ‘Papaji’ (H W L Poonja), there was another issue raised in that portion that I did not specifically discuss in that article but that I said I would discuss in a later one. That issue is the idea that Poonja could somehow give people an experience that bypassed the need for ‘a rather intense, vigilant practice that took place over a long period of time’, which David acknowledged (at 13.53) was what Bhagavan used to recommend, so this is the issue that I will discuss in this article.