Maybe you'd better take that up with St. Paul...you know, the guy who had that Damascus Road Experience.
Meantime, there is no parallel here with Joseph Smith. St. Faustina did not start a religion with her revelations. Indeed, due to initial misunderstanding, the religion to which she did belong put the squash on her private revelations for decades. It was hardly solicited by the Catholic Church, and took decades to gain real recognition.
"Private revelation," so-called, which is what all modern time apparitions are, does not have to be believed or acted on by any Catholic for good standing in the Church. That is certainly the case here. Despite this, it is churlish and self-important arrogance for any Catholic to simply dismiss them all in the face of credible evidence. With some of the apparitions, given the extensive investigations of the external evidence they provide, it would serve any *Christian* well (Catholic or not) to seriously consider those apparitions the Church acknowledges are credible ("approved").
For instance, Fatima, where, on October 13, 1917, 70,000+ people simultaneously saw the "Miracle of the Sun" as a culmination to several visits of the Virgin Mary to three small shepherd children. A number of people also saw the apparition, though separated by many miles from the main body of people. An anti-Christian, anti-clerical Lisbon daily, "O Seculo," sent reporters to scoff at the "superstitious nonsense." Seeing what everyone else saw, they were quite badly shaken by the experience. It has been said of them that "They came to scoff and stayed to pray." They courageously wrote about what they experienced in their paper, which courageously published it, to the consternation of the readership. If you read Portuguese, you can see the accounts for yourself. If you can only read Spanish, you can still figure it out. The messages conveyed at Fatima spoke of things which came to pass, largely fulfilled by WW II and its political circumstances and aftermath.
Or Lourdes, the town in France in which the Virgin Mary appeared to Bernadette Soubirous some 20 times in 1858, leaving behind a curing spring which has left a goodly number of scientifically inexplicable cures in its wake. St. Bernadette herself remains something of a miracle. I happen to be looking at my indult Latin Mass calendar right now for February. There's a 6x8 picture of St. Bernadette right there at the top of the fold. The picture is a recent one. She died in 1879. She looks like she's merely sleeping. Discern the implications...
You must have the parchment-colored calendar with the "Old Calendar" feast days.
She was so pretty. Why do people think it's cool to come in here and mock Roman Catholics? It makes me want to go to the thread where they're trying to figure out when the Rapture is going to come, and start slinging insults.