That's funny because that's exactly what most Eagles fans keep saying. They need a new OC because Groh is terrible and Pederson has become too predictable and losing their QB Coach Flip has really hurt, Alshon is too slow and they need to find better, faster WRs, they need to improve the OL and upgrade the RB because Wentz can't be expected to carry the team.
Yes, this proves the whole "Wentz can be a team on his back" Wrong. If people are saying he's good, but he just needs a great QB coach or a better OL, or a better supporting cast to be Elite and the top NFL QB they seem to view him as. Wentz is good, but not a great "Can turn lesser a talented team into a playoff team/turn any average WR into a dangerous/productive weapon" Elite type of QB some are trying to build him up as.
When some say that Wentz didn't have a good for a season as Dak did in 2016, because Dak had Zeke and an oline etc and Wentz had no RB/Oline as good, then they contradict Wentz Supporters/Philly fans who act like Wentz can carry any team to the playoffs/Superbowl in a true "Carry a team on his back" way. Just like they discredit Dak for needing a certain supporting cast around him. They use the same logic to excuse Wentz if he struggles/makes bad plays/or doesn't live up to the QB they hype him up to be.
And I feel like there are only a few select QBs who can truly put a team on their back, as in uplifting lesser talented supporting casts into a playoff caliber team. But, many QBs need a strong supporting cast to assist their stats and help them be more productive. As many need a strong supporting cast to help carry their teams to the playoffs.
So, while Dak does need certain parts around him to be productive, it still doesn't make sense for their to be a double standard concerning Dak. Using the supporting cast debate to discredit anything that Dak accomplishes. While using it to make excuses for other QBs if they don't accomplish a certain set goal for his team or fail to accomplish whatever the QB's supporters build him up to be.
And saying that Wentz can put a team on his back, while the Eagles accomplished a Superbowl win with him out and injured, proves that Wentz was assisted by a strong supporting cast.