Why? Dee and Sue are still among the best at their positions in the world, never mind the country. It's not that it's an unpopular opinion, it's like saying "Stewie already made a few teams. She should give someone else a chance". The people who are on the team are either among the best at their positions in the USA, and/or such consummate team players that make everyone around them better that they HAD to be on the team.
Some of the new blood found its' way onto the team in people like Atkins, Collier, Diggins, Grey, and on the 3x3, all 4 players of Dolson, Samuelson, Gray, and Plum.
Sue and Dee are not only among the best still at their positions, but both are likely starters for Team USA. Not that you mentioned Catch, but Tamika Catching was probably the last person to make the team, in that year probably beating out Parker, and she was the last person off the bench on the 12 player team. That won't be the case with Sue and Dee.
She wasn't in the pool this time around. I agree she will likely be next year for the 2022 World Championships. I will be very curious if the start including Paige and Caitlyn Clark in the pool as early as next year. I know they like to include college players
As a total side note, I was never a fan of Skyler, but I happened to catch an interview with her after a recent game and came away impressed. Much more of a team player than I thought (mentality wise) and really high B.B.I.Q. Very aware of what the team was doing/needed, and also had some spot on comments regarding what has changed since Dee's injury.