Trail blazer do this as they are looking to get out of the Grant contract, instead of seeking high draft picks in return for Simons. They take on pools contract as he is close to equal talent of simons.
Wizard get a solid return from the Magic, specifically with Goga. They take on grants contract along with Cole Anthony to provide more depth.
Magic lose some depth in this deal to make room and create return value for simons, who is an explosive "Dame" like scorer. He will be do for an extension that they should quickly look to sign.