I think your default assumption is faulty.l to begin with. I do believe blank assignments are more or less a carte blanche to write whatever, so I'm not concerned about the outcome of your approach here, but there are plenty of fandoms where the majority of the writers and readers don't like the canon. You can argue "well, then it's on them so say so" (fair), but "if you request it, that means you generally like the canon" and acting like it's just a few outliers who feel otherwise is just not true.
Re: Why isn't Yuletide growing?
I think your default assumption is faulty.l to begin with. I do believe blank assignments are more or less a carte blanche to write whatever, so I'm not concerned about the outcome of your approach here, but there are plenty of fandoms where the majority of the writers and readers don't like the canon. You can argue "well, then it's on them so say so" (fair), but "if you request it, that means you generally like the canon" and acting like it's just a few outliers who feel otherwise is just not true.