Another thing to consider is Embiid's injury history.
To his credit, he's been relatively healthy this season (though still missed about 20 games, including two playoff games), but god forbid if he suffers another major injury, that could seriously impact the rest of his NBA career (though he's still getting handsomely paid). And lets be honest, he IS the process.
Also, no one knows what to expect out of Fultz.