I agree with u, it's pointless.
It happened the same to me, i installed nova rom, by flashing it trough nova recovery. Before of that i did a backup (in recovery) just in case. Then i saw that i dont like nova rom, so i tried to restore the backup of stock rom from the recovery... the procedure went well, but after reboot i was stucked on the black screen for 30 mins, so i plugged to pc, runned the lg software updater and did an emergency recovery. i unbricked it finally!
btw i dont understand why "restore" option in the recovery didnt work well at all, i did a wipe data before flashing the backup... waht i did wrong?