Yeah, running anything related to AI involves GPU instances. An alternative is to point people to using Google Colab where you can get access to a GPU for free, but that's not a smooth end user experience for most folks.
This is not true. A _lot_ of AI applications use algorithms such as logistic regression or random forests and don’t need GPUs - partly, of course, because GPUs are so expensive and these approaches are good enough (or more than good enough) for many applications.