I've seen analyses showing even without CZ it was just a matter of time before the house of cards collapsed.
"It's only when the tide goes out that you see who's swimming naked". The tide was going out even without CZ's actions. And FTX was swimming naked to the bone.
Oh FTX was definitely a house of cards, but maybe they could have played funny money games, got more investement, and otherwise stayed solvent until their Antropic bets paid off mayyyybe. But CZ definitely swept their legs out, purely out of spite.