Trump brought up the term fake news and many of his followers believe it. And to be fair, you have a point in that we (humans) tend to defend the religion of our parents and culture. I would argue, however, that the origin of most major belief systems was not willfully made up. Whether or not the Creator of all seen and unseen is made up or not can not be proven one way or another. I do think that you can willfully imagine whether or not you want Him to be real, however.
I believe people can have spiritual experiences, however I also believe that any god/s that created a universe would be so unfathomably complex and so removed from our minuscule and ephemeral existence that any form of real communication would be impossible. At best poorly understood tid-bits, that are as bedded in the persons world-view as they are any piece of information for them will at best be poorly grasped, and only scantily understood through their personal world-view filter. Like communication between people that speak different languages, but raised to an incomprehensible power. One could not help but make up most of what they could then communicate to anyone else.
In this vein any spiritual experience via intense prayer or meditation is mostly seen by how it reinforces your world-view -- what you have been taught and trained and told to see.
Thus you see Jesus, a muslim sees Allah, a buddhist sees Buddha, a hindu sees Shiva, etc. It's the interpretation by the world-view.
And this then reinforces your belief in your religion.
Catholic 'traditions' are dafter and more convoluted than most and as a result are having to change to prevent further loss of followers. The fact that a belief needs to change this radically is evidence of how nonsensical it all is.
Having existed through (and been a major cause of) the dark ages, while maintaining services in an archaic language that very few (church elites) understood, where pomp and ceremony were the drawing points for the crowds, I would expect no less.
Mine neither, but they have been around as long as the Catholics, if not longer.
And I think any ceremony or procession or need to get approval for anything (like weddings, etc) has to be made up.
During that period they were predominantly a political, diplomatic, financial and military force - religion was the shop front but their purpose was power and control. They had staggering wealth and power and abused it horribly.
Can you think of any church is not involved in power and control of people and wealth?