Why philly does it?

Philly is a top 4 team in the east. Losing Embiid is crushing. Getting Vucevic gives them a viable option at center that can hold down the fort until Embiid recovers. If Embiid makes it back before the playoffs. Vucevic will be huge off the bench. Lavine is out for the season, but getting him without giving up picks is worth the risk.

Why Bulls do it? Tobias Harris will help the remainder of the season or they can flip him alone to get a pick, but to save nearly 60 million off the cap at the end of the season would be huge for this rebuilding bulls team.