That's not the issue. Upthread, you posted (and I quoted) "I based everything on how medieval villages worked and how interpersonal relationships between humans work." The relevant issue here is not trust, it's expertise.
I think this from later in your post illustrates why trust is important.
I don't really follow this. I would trust MI Finley or Inga Clendinnen, above the typical FRPG GM, to be able to imagine the range of human personalities that might be encountered in a given social situation from a non-modern historical period.
You respect Ms Clendinnen knowledge and background enough to trust her that how she handles the roleplaying will be and feel authentic. Trust her judgment as to what rules the campaign will use to reflect how the setting works and so on. This does imply being a blind follower but rather interacting with a colleague who has demonstrated they are well-versed in the subject matter.
I am simply going on what you said: that you based everything on how mediaeval villages worked. The "available information" here includes extensive scholarly research. Making "the best of" that means engaging with it in a serious fashion.
Now maybe you meant that "I based everything on my rough-and-ready sense of how mediaeval villages worked". I don't know - I'm just going on what you posted.
If you don't I understand where I am coming from then I refer to @BedrockBrendan point of view here
I will try once again with a specific example.
The players want to buy an existing building or some land. What is the price? Sure you could look up various historical documentation and pick a time and place to model one's own setting pricing from. But there is a problem, that if you are not aware of can't lead to incorrect assumptions about the price to buy a piece of land. Namely that unlike the modern era, real estate wasn't sold at a profit in western Europe.
Instead the concept of Just Price meant that the "price" was basically what it cost to acquire the land or build the buildings. If you bought land that was worth £100 and it had £50 of improvement in buildings then it price was £150. If you were to sell it, it price still would be £150.
Land and building were built as income producing investments and were sold rarely as a result. Plus the church (and many other non-christian cultures) viewed profit and interest rates as sinful or wrong. In Western Europe this basically meant customary prices (sometimes enshrined in law) were fixed.
Specifics varied by region, culture, and time. But this and the fact that real estate often came with obligations and rights is what set medieval (and earlier times) land ownership apart from modern real estate.
Undoubtedly many will hop on and say "Rob what about X, Y, and Z?" Sure but most of those details starts with the fact that most pre-modern cultures folks had a firm idea of what things were worth and if you tried to go above that you suffered socially as a result. I.e "The Just Price". How this was implemented differed from time period to time period and by region.
A campaign set in medieval times will be more accurate if it used the idea of the Just Price, especially for real estate.
OK. I don't really know how to make this fit with "I based everything on how mediaeval villages worked". That seems like a historical thing.
Campaigns set in specific time periods in specific regions require more research because the whole point of the campaign is to pretend to be characters doing things in that time and place.
With my own setting, I can take various details from different regions and cultures and combine them in something original that fits the setting and medieval time period. It helps to understand why details developed in the first place in our history as some existed because of specific circumstances.
This is Scourge of the Demon Wolf, yeah?
Scourge of the Demon Wolf
From that summary it's not clear how religion figures in it. It makes it seem an essentially atheistic setting, like REH's Conan.
Elder Anselm is the "parish priest" of Kensla and a major community leader. If things were normal the community leadership would consist of him, the Reeve, and the Baron's bailiff. With the bailiff being the final authority except on matters of religion.
But things are not normal and the bailiff is dead. Depending on how events go, Reeve and Elder Anselm will disagree on what actions to take and this will results in complications for the party.
I attach a summary of the different events that may result from the players undertaking the adventure.
Also to understand what this list means