Honestly, you would be surprised at number of games using AI art, and recycled art, currently...
It takes a bit of skill to get some good art generated, from textual commands. That, in a sense, is an art too. It is NOT difficult to get a coherent "style" of art, when you know what you are doing. Literally, you just have to tell the AI to make something "like SOMEARTIST in SOMESTYLE", and it can make it, if it has "learned" that artist and style.
There is still a BIG misconception that AI is "using art" to make art. It is not, it is using "learned data" from art, which is used to make similar art. It knows what "faces" look like, in a general sense. Of the millions of faces it learned, it knows that faces have eyes, eyes have eyelashes, eye-lids, eyebrows, pupils, irisies, eye-whites, moisture/gloss, etc... From all the data, not the images, it has learned what pixel-colors, directions, saturations, shades, tones, hues, gloss, sharpnesses, etc... belong where. It layers data after data after data, creating more and more details of "similarity", not images of similarity. It is actually an interesting process to watch the actual "build-up" from a blob, to a person-shaped blob, to a toon-like person, to a semi-realistic person, to a real-like person, to a highly detailed image that could be mistaken for an actual photograph which matches NOT ONE ARTISTIC CREATION EVER MADE, from anyone. Just from asking for
"a cute girl in the woods with a bear, wearing a red outfit, holding a basket of food". Filling that basket with different food every time. A different basket. A different girl. Different trees... etc...
You can even use masking, which involves taking one creation and masking an area, like a face, and asking the AI to generate something different there. It will use that "face", to detect that it is a face, and come up with another "fitting face", as if it belonged there, in the same style.
The possibilities are endless, and the plethora of "concept art" that most AI has trained-on, is expansive. Just don't expect hands, sometimes limbs, or complex poses to be perfect. Having an actual artist "fix" the AI creations is often a valid solution to save a LOT of trial and error, in AI creations.
You don't have to say that your artwork was created with AI... It currently isn't really a "selling point", and your post is a clear indication that it is actually a "counter selling point", if mentioned.
Also, for the record, people are using AI to also WRITE and enhance many of these new VNs. This INCLUDES coding them! AI is NOT limited to only drawing art! They have whole AI services out there, for almost everything now, including spamming, call-center help, call-center sales, etc... Yes, AI is used to actually SELL things now, by calling people and having conversations with them. Quite convincing actually. They know, almost, the perfect thing to say, to every type of response. Including the ability to know if the person is at a stalemate and totally NOT interested, so it is not wasting time talking further. AI even makes MUSIC... Lyrics and playing actual songs!
They are never going to know... They're gonna know... They're never gonna know!
Heck, even photoshop now uses AI, heavily, within the program, for various things. That is one of the new selling-points for photo-shop! There is no escaping it, it is here, it will stay, and everyone will be subjected to it. Don't limit yourself to NOT using the latest tools in creation, because of a few resistant people who have misinformed, hypocritical and extremist views. Focus on the majority who want the VN, not the minority who would exclude the VN for frivolous reasons.
My personal views about "art tools"...
Complaining about AI art, is like a painter complaining about someone taking a photograph of the same scene they spent hours painting by hand, to look like a photograph. It is like a physical painter complaining about a digital painter, using a computer instead of oils and acrylics to paint. It is like complaining about someone using a digital camera, with filters, instead of hand-developing real photographs. It is like complaining about someone using photo-shop to manually "touch-up" a poorly photographed image, instead of taking a better camera shot. It is like someone complaining about someone using a "filter", to "touch-up" a poorly, digitally painted image or photograph...
It is like complaining about someone using AI, asking it to make something, instead of asking a person to create it. Even though you have NO idea what the person is going to make, it takes long to make, and it costs you no matter what the end result is. As opposed to just changing the "ask" or the "values", and instantly getting a new result, without spending a dime or wasting an artists time.
The funny thing is... Now, we have no clue if the artist is using AI, or manually creating things either!
Those fingers... LOL. Artists are not obsolete... Just put into new places and demands! (Or you just crop the unwanted parts out!)