I think there is a line between content and creator. The question about being "open" about certain things does not even arise. This includes religion, but also sexual preferences, topics of identity, political and ideological views, even diet and most other things that are basically personal information that can and will be viewed as preachy, if shared without asking. And most or all of these are things I need not know of a game dev. I am here for games, not developer people.
When I look at a game page and look at the profile and see things like how the creator deems it necessary to inform the world about personal views and non game relevant things like their pronouns or denomination or if they are vegan or not, I tend to quickly ignore the game, for fear of it being just an outlet of ideology, instead of a fun game to play.