I had some time to chill out and I agree with you, by and large, but here's what gets me:
You can totally differentiate between someone who has excelled at a physical sport. It is apparent in posture, economy of motion, and honestly even pure physique. I did 10 years of competitive ballroom dance at least 10 years ago now, and I guarantee even I could have made a better show. That is not indended to be a humble brag: im pushing 40 and kids tore up my physical prowess lol. I CAN stand up and full space though, and move with my whole body in an intentional way. The selection pool, even if there is not a breaker scene, could have been widened to include people who wouldn't look ridiculous even with exactly the same routine. It's just totally wild lol.
It really is the best theme in the franchise IMO.