I don't think it's intended to be enforced very well, just to 'boil the frog' so to say. Either that or incompetence & not realising it won't work.
Even if it passes and isn't enforced well it'll legitimise more surveillance & identity checks. It'll probably be terrible for privacy on people who aren't as tech literate to avoid it.
Whenever I need a bootable USB I always go for ventoy, much easier to just copy over the image.
That said, if you're having a lot of trouble it might be something else, say a bad USB, port or image. I've had devices that can't recognise particular usb sticks or from a particular port for no apparently reason. Sometimes its just cursed.