It’s tempting. It’s easy. Some of those images are really good!
I worked with an author on a how-to book about surviving job loss. He asked the cover artist to find a royalty-free image of a goldfish leaping from one bowl to another for the cover.
It almost got to be published that way.
Here’s what a simple Google image search shows.
I’ll just leave these Amazon titles here (there are more if you want to look search yourself).
You get the point.
Make your cover your own.
One is tempted to ask why goldfishes on book covers never leap to the left. You can add your suggestions in the comments.