The Diamondbacks aren't that homegrown. Gallen's on his third team. Kelly was drafted by Tampa and went to Korea. Walker, Marte, Gurriel, Pham, Longoria all not homegrown. Yeah, some of the others are but Phillies have plenty too (albeit more on pitching side and with Hoskins on IL).
Besides, turns out you don't even need to win 85 games and you can make the World Series. Phillies are gonna need to do some things to have sustained regular season success for years to come but when you make the World Series and the NLCS two years in a row (and at the expense of the Braves, Mets, Dodgers, Cardinals, Brewers, Padres) you're still doing it mostly right.