I don’t understand why most people assume Philly will win this series.
It's mostly people from one of two camps:
A) Hinkie fanboys who talked a lot of crap about how the "process" was such a brilliant strategy. These people are now so heavily invested in being proven right they'll say anything, regardless of how ridiculous, to validate their previous nonsensical opinions.
B) National media blowhards who want to hype up Embiid and Simmons as the next great duo. Sure, these are two very good players, but both have a long way to go before they deserve to be held in the esteem they are currently being held.
As for Antoine Walker, he was always a bit on the dull side, so him making such a claim is probably proof the exact opposite is likely to happen.