I checked the complete wiki page for outdated information, minimally updated a few sections and then removed this banner. The guide is still very verbose and duplicates information usually found on the “Install a Raspberry Pi” and “Configure/Update your station” pages, but there is nothing inherently wrong.
I also added a new section “Installing Image on Linux/Windows/MacOS” using the Raspberry Pi Imager. Maybe someone here wants to check this section (and edit it / remove the banner if it works)?