why do some isos not boot with ventoy

[perfection]

There are many reasons.
1. Some ISO file doesn't support UEFI mode itself. So if you boot it in UEFI mode it will fail.
2. Some computer has bugger BIOS/UEFI firmware.
3. The ISO file is corrupted during copy to the USB
4 .........

I have an Easeus Data Recovery UEFI bootable iso that works when pulled onto a USB with Rufus....but does not work with UEFI boot when added to my ventoy disk (the other UEFi bootable iso do) 


By the way,  Can we rip the bootable image from an bootable USB disk made using Rufus and use such as iso bo copying it to a ventoy disk?