At least in my experience, outside of fandoms, I only hear the word canon in regards to the Bible. For those who believe in such things, it can literally be deadly serious what is canonical and what is not.
I emphasized the above in bold to illustrate the lack of awareness and understanding for the fandom as a whole or even
literally the next forum over.
You claim that fans can’t have fun evaluating fictional sources, prioritizing and putting together invented elements into a hobby construct without that being comparable to… what? (I’ll be charitable and say belief in eternal damnation; you know, if you dare think that Picard was still in Starfleet as of 2387.)
What about hobbies such as cosplay or model-building, which are also finicky about their (re)sources? “I had the blueprints when I was little, and the ship was a bit off but it looked cool and that was fine!” Well, sorry, but it doesn’t work that way. People like to be accurate, and the main standard of accuracy is what’s onscreen and what most of your audience will remember.
This is not to say that
Star Trek cannot be enjoyed on various levels, but if a writer or a showrunner isn’t that good or if they’re interfered with too much, their works won’t be followed for the usual, literary kind of fun. The difference is that casual audiences will move on, while fan audiences will linger with questions: “What else happened? What happens next?” I’m sure the franchise owners are only too happy to oblige, otherwise they’d put a another moratorium on the franchise until they can find a way to commission
Star Trek that isn’t merely good enough for fans and the odd casual viewer.
If someone doesn’t like to see their work analyzed for lore or prioritized on that basis, there is an actual solution: don’t work for an established franchise. For the most part, original works are taken on literary merit alone, and even if they start being analyzed for lore, it’s all canon anyway. Frankly, I’m surprised how many people don’t just take this in stride: if someone likes the story, great; if they like to play with the scenery, or if they’re not buying the book because it doesn’t fit the scenery game, also fine. Such acceptance really should come with the territory, which isn’t all about the casual audience.