Yes you’re right some of the tags do not fit very well to the current state of development. I am a bit hesitant now to change any tag at all in the current situation. Not that somehow by changing thing the game get reset to the end of the review queue or the likes.
Regarding implicit tags. As my game was actually indexed I tested several tags via the discovery page to verify how users would discover the game. One thing I noticed was that the “No AI”-Tag worked for my game despite I never added that one to the tags myself. Which is why I assumed some tags may be added based on the classification. Which then lead me to the initial disaster by removing adult tags and see which ones remain so I could then add those missing I deem necessary.
Edit: Just verified the No AI thing. If you click on Content No generative AI was used it will lead the user to https://itch.io/games/tag-no-ai which makes me assume the No AI tag is implicitly set for those games.