When one group says that behaviour "X" is perfectly acceptable even good and claims this has been revealed to them by the Holy Spirit and another says that behaviour "X" is gravely evil because the Church guided by the same Holy Spirit has always taught that this is so, you don't think that is confusing for many people? Who are they are to believe?  Such is human nature that many will plump for what is congenial to them rather than what is true and right. We are not talking about hypotheticals here but real, concrete decisions which affect people's lives.
The internal forum is grossly misunderstood and has become an euphemism for wilful self-deception. The last thing God the Holy Ghost does is sow confusion.