Disclaimer: this is purposefully obtuse.
Other effects in the game which explicitly state they kill you:
Shadows, succubi, massive damage, death saving throws, beholder death ray (notably not even their disintegration ray kills you), power word kill, vampires, mind flayers, night hags, drow inquisitors.
Clearly, if they intended for disintegration to kill you, they'd have said so. Since specific overrides general, and there is no general rule that disintegrated creatures are dead, I rest my case. QED.
I'm not looking for assumptions, I'm looking for RAW. I don't know about you but at my table we play by the rules.
I think the bigger problem here is that you're arguing in bad-faith.
Bad faith? The only faith I have is in the rules as they are written, like a gospel!
The argument here should be "yes," as arguing according to the rules is arguing in bad faith. That's the point of the post lel.