The great question is "why does any thing exist at all?"
If nothing existed, it would have the properties:
DOES NOT INCLUDE (X) - FOR ALL (X).
This is a mirror of the properties that would be held in a Modal Realist multiverse, which would be:
INCLUDES (X) - FOR ALL (X).
Where (X) can be qualities, objects, arrangments of qualities or objects etc.
The idea trying to fit itself into my skull is that Everything exists - as a shadow cast by Nothing. I hope that made some sort of sense to you, because it doesn't to me, and I believe it anyway.
The question i no longer why does anything exist at all, since the answer to that is that EVERYTHING had to exist as the other side of the coin of NOTHING EXISTING.
The new question is what aesthetic criteria do you wish to use to evaluate existence and/or justify/abhor its existence.
I choose to evaluate [EveryNoThing] by the presence of love. Love exists. All suffering is redeemed. [EveryNoThing] is good.