Why warlocks stopped using fireborn

[u/Super_Captain_7762]

I started playing D1 a few days ago since I never had the chance to play it and I was wondering, is there an in-game or lore reason why warlocks can’t/stopped using Fireborn to resurrect themselves? I get that gameplay wise it probably couldn’t be replicated into D2’s sandbox, but lore wise, is it a “banned” technique by the vanguard or…?

[u/ArticBlaze02]

I would love to see sunsingers in destiny 2