You don’t need, and shouldn’t have a “death grip” on mountain bike bars.
I find drop bars give me enough positions to rest my hands. You also don’t need a death grip on them even over rough stuff. Hard to do hydro brakes with them though – road BB7s work though.
This will explain it better than I can.
Hahaha that link just sound like someone trying to justify their inability to adapt from road bikes to mountain bikes and using it to create their own niche.
Each to their own.
To the OP: I would try other methods first, before you try the drop bar “look at me I’m different” thing.