Just my two cent. I don't really care who can bottom who can top. I also accepting all fetishes (bar those morally wrong). What's important is how they are delivered.
And I Totally agree. Creators should list all the fetishes in their contents, and if possible made it so one can choose to avoid / skip certain kinks should they don't wish to see.
But Top / Bottom are not fetishes are they? Unless it's centred around one premise, like "Small on Top", or "Only I have skills", most games don't really stay on one side. Also "For every bottom there's a top". And for VNs, the story is more important than who top who bottom. Less so for role playing games, but those are normally got both covered.
Some players do want it specific, but that's not what creators should be adjust to - it's the other way around: Content creators create, consumers then go to find what's for them.
People ask stupid question without any research all the time, IMO these should just be ignored. Most of these answers are spoilers - remember different people have different "spoiler tolerance", these should be respected over those "Spoon Feeding".