Why Portland says yes: Four first round picks plus two very promising young wings still on their rookie deals is a great haul for Dame. Plus, Tobias's contract comes off the books after just a year, could even buy him out if they wanted to.
Why Philly says yes: With a Harden trade coming any day now, Philly will need his replacement. CJ is a solid budget option who shouldn't cost more than a protected future first (and Tobias). Can use the Harden deal to acquire a starting level wing and quickly retool around Embiid.
Why New Orleans says yes: Dame/Zion/Ingram is immediately one of, if not the, best trio in the league when healthy. You still have plenty of future picks remaining if things go south and keep valuable pieces like Herb Jones and Jonas Valinciunas.