The difference being the image is almost half the height of the screen and on a contrasting background, where the characters in game are much smaller unless you’re zoomed in on them and details are hard to make out. While it may not be an issue for you (I personally don’t mind the image), it draws questions every time someone sees it. It also pops to the front any time a timed activity or craft is finished, which is awkward when I just have the game in background at work.
The image toggle, along with the “finished” popups, have already been acknowledged by the developer, so this isn’t another complaint, just some perspective.
It seems like the miqobot logo (the one on the top of the forums) would be more appropriate branding within the program.