Meh. Considering that they also mention that "make sure the device is plugged in but not mounted" I suspect this is another distro that decided to put all of its eggs into the ISOHybrid basket, without realizing the unintended consequences of it (such as Windows correcting the backup GPT record if the USB isn't the exact same size as the image drive, or any checksum validation being thrown off if you have an ESP on that drive).
Or maybe they just don't know that Rufus has a DD mode that (AFAIK) should work as well as any other DD application you'll find on Windows...
At any rate, I don't have much of an issue with distro makers pushing for whatever tool they think is most suited for the job of creating bootable media, even if they advertise for something else than Rufus to be used.
Yep , it is only "queer", as I always thought that it was a boot utility/tool (like Rufus/Unetbootin/etc.) that could "decide" to support (or not support) a specific .iso/Os/distro, not the other way round.