Why are all the transparent (ai/png) images have fake transparent background that is an image!

This is completely useless, i can't use any of the illustration files I find in ai/png as it has an actual image background of a fake transparency. Why is Adobe stock allowing these images into Adobe stock? None of these images should be allowed in the program. And no I'm not reporting the images as there are too many and I'm not wasting any more of my time. Fix this immediately.