Had to fix it YET again. I didn't realize that bash had -b to verify if something is a block device

bare-arch-install.sh

@@ -13,7 +13,7 @@ BOOT_METHOD="${BOOT_METHOD^^}"
 }
 
 DISK="${2:?"Disk was not provided"}"
-[[ ! -f $DISK ]] && {
+[[ ! -b $DISK ]] && {
 	echo "Your disk ($DISK) does not exist. Please provide a valid one"
 	exit
 }