Yeah but those are using the standard ignition switches, not the push start. They pull the dash down and are able to use a USB cause it's about the right size to turn the ignition cylinder from the inside. With a push button I don't have a cylinder to turn, that method won't work.
Hyundai without immobilizers that can be stolen aren't push button start ones, they're ones where you stick a USB flash drive into the wheel to get it to turn over