Sorry, let me be more clear, when I say "lifting a finger" I mean go out and put the time and effort into trying to find a good website that hosts images, effort into sorting the images, searching for the ones you like and downloading them.
So yes, I did lift a finger. Also the images I found esp on public domain were all made by humans.
While writing a prompt is somewhat effort the same way I type in the pubic domain search box, but the big difference is how the images are. On one hand the images I got are human made, I had to go through tons of them to get the ones I needed, but on the other hand, you got yours via a ai generator, a generator that was fed stolen art as training data for you to get the image you want in 30 seconds.
So using an Ai image generator is below the "Low effort" bottom of the barrel, cause it shows you can't find what you are looking for yourself without having to get some bot that was trained on stolen artwork that spit out content on mass. To be clear, what I did IS classed as low effort, but I didn't stoop that low that I had to use AI-generated images. And If I were to make a card game and publish it to the public I would create all the images myself.
P.S: To be clear, I'm not telling you don't use Ai to make images, I'm just telling you my pov on the matter. Because using ai to make images for a game is the peak of laziness and one could be slightly less lazy by discovering what they need online that's already there.