I always thought "burn" referred to optical storage like CD-ROM?
Not sure about others, but when I do BSD installs I do not have to click any buttons. I do not need a mouse.
I can lazily use something as small as an 8M stick for the install image. It couldn't be much easier.
With the size of today's RAM (500M+), using the install image I can make the custom image with my personal kernel configs, utilities, and settings entirely in memory without needing to write anything to a HDD. Then I just dd the image to the removable media. That is the slowest step.
My custom images are quite small too, under 16M, and need no access to a HDD. The system runs just fine in RAM, no swap.
I guess I could do the same setup with "Arch" but I imagine it would take considerable work undoing pre-configurations based on assumptions about how I would want my system configured.
Easier perhaps to just compile my own custom Linux kernel and "initrd". Build from the ground up.
I like the flexibility and control with BSD. Not to say Linux does not have flexibility and control, too. It certainly does. I just rarely see ordinary Linux users making use of it when installing. Instead many if not all decisions have already been made, and everything is pre-configured. "One click..."
Kudos to the OpenBSD folks for the network drivers.