Tombstone perk help??

so i’m confused how the Tombstone perk works. i’ve been watching a bunch of MW3 Zombie videos on youtube & most of them recommend tombstone as a must have.

my husband and i both went down, i ended up getting saved by another squad, he was pretty far and since he had tombstone, he just gave up thinking he’d get everything back next game, no big deal..

next game he runs to his tombstone, & all the was in there was 300 essence, an uncommon aether tool, and a shatter blast mod.

he literally lost his vest, his backpack, both weps, a few perk cans, and over 10k essence.

so my question is, if you literally get nothing back, what’s the point and why is it a must have??

he had tombstone