Max Fried was a top ten pick, so it isn't like this is some crazy insanely good scout who found a diamond in the rough. He was also traded by the Padres to the Braves. Aaron Nola, whom the Phillies drafted and brought along, was a Cy Young finalist last year so I don't think it is fair to say the Braves have a great scouting staff because a guy they got in a trade that was selected in the first round is pitching well but the Phillies scouts are awful because we don't have good young pitchers and just ignore Aaron Nola.
There's not really an answer for that. Baseball is such a crap shoot. After losing their dominance in the mid 2000s, they have only made the playoffs four times in the last 12 years and haven't won a playoff series in nearly 20 years. It isn't like the Braves have a constant flow of young good arms that help them win. Most of those years the pitching staff had guys like Tim Hudson or Aaron Harang on the staff. There were some bright spots like Mike Minor and Julio Tehran and Jair Jjerjens who were good not great, but you can look at any team including the Phillies and find young pitchers pitching good not great. Going in to this year Pivetta was a guy I think most people were excited about and he hasn't had a great start but I don't think you can just write him off because he had a bad start and has to do some time in the minors. Even Efflin, Eickhoff, and VV are guys the Phillies brought along and while they aren't world-beaters, they are also not just scrubs that are holding a place until a REAL pitcher comes along.