I agree with this methodology, and it’s reminiscent of how traditional roguelikes are defined here. I’ve used a similar approach in my own endeavor of defining incremental games - define a canon, find the qualities they share, and indicate which ones seem most important to have.
To expand on what pipariturbiini said, the game is about discovery and knowledge, so any spoiler you look up is directly removing a part of the game experience for you. I’m sorry your experience was tainted by the advice to not seek out spoilers, but overall I think it does help ensure most people have the optimal experience.