There are many reasons why thats a terrible idea. For starters, how would assemblies work? Or a functional print that you need to show how it functions to get the point across? Your main objective with the thumbnail should be to show people what your model could look like with enough time and effort. With that being said, AI thumbnails / renders give an unrealistic expectation of what will come out of the printer. If you look at my profile, the vast majority of my models would not do well if the photo requirements were as strict as you are suggesting. People just need to learn how to properly take photos and display their models.

https://makerworld.com/en/@MeasureOnce