You still do not get it, do you?
Tags. Are. Chosen. By. The. Publisher.
Maybe ponder a bit, what consequences this has. And that there are only 10 tags you can have. And that the devs not only chose the tags but create them. They are not from a fixed pool. You can use any tag. Even the ones you suggested. There are even people tagging "game". Or "indie". Even "3d game" is used as a tag.
With this knowlege you can answer all your questions yourself. Also the question, why it is not done what you propose. And not doable.
Also, if you quote external, please put a link. That read like stuff that people would copy onto wikipedia. And that is not always correct. But most importantly, it is not context appropriate. We are talking about tags on an indie gameing site. Not about technical terms or marketing buzz words. What good does it do, if you use technical correct terms, but no one using the site would search for them?
Should you still wonder how to find the games you want, maybe try actually searching for them. You will find out, how to find them. Browsing for a specific tag goes only so far. Use alternative tags that mean the same. Click on related games of games you like. Look at your recommendations. Look at the collections listed when browsing, someone might have made a 3d games collection. Or use the 3d tag and scroll past the vn. You can even browse for 3d and add the exclusion for visual novels. How to do that, look in other threads about tags. You will find it.