Unfortunately, it’s definitively an instance of intentional design. This whole consent dialog thing became a booming “consent management platform” industry. Many of them advertise better acceptance rates than the competition, or used to but have removed those claims in more recent times now that the big GDPR boom is over.
This particular dialog is TrustArc, who are infamous. At one point they defended it with a “well, we gotta retry if it fails to make sure your preference is expected, and we can’t know if your adblocker is causing it to fail or if it’s just a fluke”, which is one of those things where they say something that’s not totally wrong but you know they’re lying through their teeth.
It’s not what the buttons look like, it’s what they do. In Krita, making an ellipse involves clicking the ellipse button and dragging it somewhere. You now have an ellipse, and you hold shift if you want to make it a circle instead.
In GIMP there is no direct ellipse tool, there’s only an ellipse select tool, likewise you hold shift to make it a circle. Then you use a menu item to select the border of your selection, getting a popup to let you determine how much pixels you want. And then, you use the fill tool or fill menu item to fill it. That’s a surprising amount of clicks to accomplish what’s most likely the single most common task for anyone opening a screenshot in an image editor. I’m not aware of any easier/faster method to do it. Feels like it should exist, but this is also what you get if you search for how to draw a circle in GIMP, so if it exists everyone’s missing it.
GIMP’s method gives you more power, but you rarely ever need that power. But when you do, Krita also has ellipse select, border select and various fill tools that can be strung together in the same way.