That game was quite the spectacle. Those type of AAU games should never have that kind of hype, those aren't even good AAU teams, no quality bigs on the floor.
Zion is a fantastic prospect, I actually spotted him on Future150's 2018 list before he was even mentioned on most of the major scouting sites, he was somewhere in the 20's and IMO it was quite clear he had star potential. What really caught my eye was some of the blocks he was getting. Also with South Carolina not being a hotspot it made plenty of sense how he could fly under the radars.
I've also been following the Ball's and their story well before it hit the limelight, before Lavar revealed himself to be an attention whore and racist, since LaMelo was about 5'8 (Now he's about 6'4"). Back then they used to say Lonzo and LiAngelo didn't play AAU ball so they could play their own style of ball, which was pushing the ball at warp speed (cherry picking) and getting extreme volume attempts up, it wasn't always pretty and always drew the ire of people watching because it looked so gimmicky, they did take Chino Hills (a public school) to the #1 ranked team in the nation using this style though..
This style was done with purpose though it wasn't just a gameplan it was to prepare the brothers for the future, and judging by the success of Lonzo (and his outstanding 3pt% at UCLA) it's hard to argue with the results; LaVar said they were taking tons of shots so that they'd jumpstart their experience/familiarity at taking shots from all over the floor. This is definitely still going on with LaMelo and it's been somethign planted in their minds since they were young, the unorthodox shooting mechanics allowed them to shoot 3's from distance from a very young age, and they've been repeating/streamlining them ever since.
So even though it's difficult to seperate, I'd advise not to judge him on that sort of 'shot selection' when it's whats being asked of him. Now that being said LaMelo isn't like Lonzo, he's a scoring guard, he's like an Austin Rivers, it seems like he could keep growing tough, he might end up 6'6" too.