Not wrong, it is shady. Though the NTDEV guy behind it does have some (sparse) information on their patreon about how and what tools, mainly seems to be done with osdbuilder. Comes down to trust as with anything on internet, I just need to run chkdsk.exe on drives from time to time and the smaller it is the better.
https://wiki.archlinux.org/title/EFI_system_partition#Typical_mount_points
(Efi System Partition)