I see it's obvious you have no idea what touched off the Reformation. That's because you were socially promoted through school and never had to learn any real history and rely on parroting commie narratives for everything.
I see you get all of your exercise from jumping to conclusions. It takes a special kind of stupid to imagine what others know or are thinking, and you are that stupid.
The triggering event of the Reformation is less relevant than the reality that frustrations with the Vatican's power and political control of European Royalty had been building for centuries. The Popes openly played favourites among the crowned heads of Europe in their endless wars of power and territory, to the frustration of some, and the enrichment of others. Alliances and power shifted with marriages which were often openly promoted by the Pope to enhance his own personal power.
These kings and queens ruled their nations by Divine Right. They did not take kindly to the political meddling, favouritism, and currying favour with the Pope. When Bibles became available and people could see the blatant lies and manipulations of the RCC, the Reformation became inevitable. If Henry VIII hadn't kicked it off, some other confrontation would have. The Reformation would not have spread as widely or as quickly as it did if the entire continent wasn't ripe for change.
Why did the RCC find that heretical?
They could not control the middle class or elites any more. There is nothing about "confession", "penance", chanting rosary prayers, or the semi-deification of Saints in the Bible. In fact, the Bible specifically says that your prayers should not be directed through intermediaries, which would not only render prayers to saints useless, but in direct violation of Jesus' directive to go directly to God.
Jesus said "My Kingdom is not of this earth" and was purposefully apolitical. In historical terms, that is the reason for Judas' betrayal. Judas was a Zealot who thought Jesus would lead the insurrection against Rome. When Judas realized that Jesus wasn't that guy, he betrayed him to the Romans, at the time no realizing what he was doing.