Aside from the story, I handle almost everything on my own, so creating a chapter every two months is impossible if I also have to draw the backgrounds. Using only free assets makes it hard to find backgrounds that fit the desired mood. I might consider outsourcing the backgrounds in the future, but replacing just the ones used so far is estimated to cost over $10,000, so I need to think carefully about it.
But, I understand the feelings of those who might choose not to play the game due to discomfort with the use of AI-generated backgrounds.