If there aren’t any visible changes then the lusers won’t upgrade. “Why did I have to switch to Windows 11 if nothing changed??” etc.

By shuffling the look and feel of the product constantly they can give an impression of actual upgrades being made. The system looks different after your update, after all.

Microsoft already knows that anyone with technical knowledge is looking to dodge this update, they don’t need to make the regular users want to dodge it too.