To flesh the villain out, the game builds her deity-like mythology up via third-party anecdotes and cutaway monologues.
Diablo 4 makes it clear that none of these three can be defeated for good.
This is unfortunately where the game drops the ball.
At no point before, during, or after this fight is our motivation to stop Lilith fully crystallised.
Diablo 4 dangles Lilith at the player like a carrot on a stick.
Were told that shes evil but not why, only that well figure stuff out if we keep playing.
Keep listening to the holograms, keep digging into her past, keep chasing the Mother across Sanctuary.
She acts like a villain plenty, but its not enough to be fed holograms and lore notes.
Anyway, enough about Lilith
Diablo 4 is a great game.
By comparison, all players really want out of Diablo 4 is more of it.
The Mother of Sanctuary was just getting started, and she deserves better.