Of course they’re allowed to describe it, they have to, they’re the ones writing it. I’m not against them having their own vision and ideas but enforcing their perspectives instead of letting players interpret things themselves is definitely questionable. I mean, for instance, I enjoyed HR but Zachary’s obsession about players adhering to his vision for the story almost ruined the game experience, especially present in the THP spin-off.
The mention of books are irrelevant, comparing IFs to books would be similar to comparing a linear game to one with a massive open world. They have similarities but any comparison drawn is a hopeful extrapolation at best.
Why would that seem bizarre? I can’t quite remember the name of the WIP but I recently played a demo where a character was introduced as having soft red hair and I was completely under the impression that the NPC was ginger. The immersion was lost when a few choices later and the narrative says the NPC has auburn hair. It’s an intricacy but discrepancies between how players and how authors might interpret something are more prevalent than you think